Redis持久化方式的选择

本文将介绍Redis持久化的两种方式：快照持久化和AOF持久化，并对两种方法进行分析和对比，方便在实际中做出选择。

持久化

什么是持久化

Redis所有数据保存在内存中，对数据的更新将异步地保存到磁盘上，使得数据在Redis重启之后仍然存在。这么做这有什么实际意义呢？将数据存储到硬盘是为了以后可以重用数据，将数据进行备份，可以在系统故障的时候从备份进行恢复。还有一点，存储在Redis里面的数据可能是经过复杂运算而得出的结果，把这些数据进行存储，方便后续的使用，以达到“空间换时间”的效果。

持久化的实现方式

Redis提供了两种不同的持久化方法将数据保存到硬盘里面。

快照持久化：将Redis某一时刻存在的所有数据都写入硬盘。

AOF持久化：AOF的全称叫append-only file，中文意思是只追加文件。当使用AOF持久化方式的时候，Redis执行写命令的时候，将被执行的写命令复制到硬盘里面，说的通俗一点就是写日志。

快照持久化

什么是快照持久化

Redis通过创建快照来获得存储在内存里面的数据在某个时间节点上的副本。

触发机制-主要三种方式

1. save（同步）
2. bgsave（异步）
3. 自动

save命令：客户端向Redis发送save命令来创建一个快照文件。

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" 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执行save命令的时候，如果存在老的快照文件，新的将会替换老的。

bgsave命令：客户端向Redis发送bgsave命令，Redis调用fork创建一个子进程，然后子进程负责将快照写入硬盘，而父进程则继续处理命令请求。

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MzW0tk/Qzrbtn1XEOrNYmvD74+PfhSujoOm/Y0xr7D+5gXrHGmFC7R2jc8s7VE1s+w7pZdzzW0WpP4+uDr04MvpavjsGlPY+w7vI95ySoztXCJ1r7hma0lsn6Gdbfseq6h1ZrE1wdfnx58b+nBh6I3QV/ZtLeVmI/xfNUm5vemZOwb7+Ozd/XalIVL//Nq/b8Uy+NsNZy/20zMx3i+anPTz99TD76nFa50dZyYD6HJnErM7xTmPG+rsWPf4X3My5Yy5wpX0No3PLO1RNbPsO6WXc81tFqT+Prg69ODL6Wr47BpT2PsO7yPhwuXrnBNKVyitW94ZmuJrJ9h3S27nmtotSbx9cHXpwdfSlfHYdOexth3eB+vL1y6wqWPFKfS2jc8s7VE1s+w7pZdzzW0WpP4+uDr04MvpavjsGlPY+w7vI/XFy5d4erZNzyztUTWz7Dull3PNfS8nqeArw++PjVjKV0dh017GmPf4X28vnCJnn3DM1tLZP0M627Z9VxDz+t5Cvj64OtTM5bS1XHYtKcx9h3ex+sLl+jZNzyztUTWz7Dull3PNfS8nqeArw++PjVjKV0dh017GmPf4X28vnCJnn3DM1tLZP0M627Z9VxDz+t5Cvj64OtTM5bS1XHYtKcx9o338VDhEj37hme2lsj6ifkQS67nGnpez1PA1wdfn5qxlK6Ow6Y9jbFvvI+HCpfo2Tc8s7VE1k/Mh1hyPdfQ83qeAr4++PrUjKV0dRw27WmMfeN9VK4rXKJn33DM1hJZPzEfYsn1XEPP63kK+Prg61MzltLVcdi0pzH2jffxUOESPfuGZ7aWyPqJ+RBLrucael7PU8DXB1+fmrGUro7Dpj2Nse+PfvSj81dfffVg4RI9+3L+biucv9PA1wdfn7XGUro6Dpv2NG6qL+fvtsL5Ow18ffD1WWsspavjsGlP46b6cv5uK5y/08DXB1+ftcbekqAbNu1tJeZDc6NJH8/XGpnzvK3GzknPvpy/2wrnb37fMYOvH3z91IyddKWLbCtCkz6VmN8pzHneVmNvqm+2dkj7CNazD74++PqsNbaqdJ2dnaWbBmkXzYlgkfvcVF/O3+2F87cefH3w9VlrbFXpmkIPb8IYfH3w9cHXB18ffH3w9cHXp2YspSsBXx98ffD1wdcHXx98ffD1qRlL6UrA1wdfH3x98PXB1wdfH3x9asZSuhLw9cHXB18ffH3w9cHXB1+fmrGUrgR8ffD1wdcHXx98ffD1wdenZiylKwFfH3x98PXB1wdfH3x98PWpGUvpSsDXB18ffH3w9cHXB18ffH1qxlK6EvD1wdcHXx98ffD1wdcHX5+asZSuBHx98PXB1wdfH3x98PXB16dmLKUrAV8ffH3w9cHXB18ffH3w9akZS+lKwNcHXx98ffD1wdcHXx98fWrGUroS8PXB1wdfH3x98PXB1wdfn5qxt/TgQ9GbkN1+qsH3tIPvaWct39/85jfnr7/++i76PnvMGmF+Tzv4nla40pWArw++Pvj6bN1Xj7t37975N77xjV30vYrXVLbum9FqLL4++PqsNZbSlYCvD74++Pps2VePicL1xhv/fRd9ryteU1/3ln330Wosvj74+qw1ltKVgK8Pvj69+v7nf/7n+UsvvXR5VWep6Jg6dsZW51f3l4Xrd7/7yS5RvHTflNe+Vd/raDUWXx98fdYaS+lKwNcHX59efX/1q19dKUtL5l//9V+fP9NVtji/um9cuM7P395lbvHaou8hWo3F1wdfn7XGUroS8PXB16dX3yhd9+9/+9ktFyVjbv7oj77dVenS7fsKV2RO8dqar0Orsfj64Ouz1lhKVwK+Pvj69Op700uXbjtUuCJTi9eWfF1ajcXXB1+ftcZSuhLw9cHXp1ffm1y69LNbuCJTitdWfGtoNRZfH3x91hpL6UrA1wdfn159b2rp0ve1hStSW7y24FtLq7H4+uDrs9ZYSlcCvj74+vTqexNLl75OLVyRmuLV2ncKrcbi64Ovz1pjKV0J+Prg69Or700rXcrcwhVxi1dL36m0GouvD74+a42ldCXg64OvT6++N6l06V+VX6pwRZzi1XJ+p9JqLL4++PqsNZbSlYCvD74+vfrelNKl59S/Kr9k4YocKl4t53cqrcbi64Ovz1pjKV0J+Prg69Or700oXXq+pa9wjXNd8Wo5v1NpNRZfH3x91hpL6UrA1wdfn17n99RLl57r2IUrsq94tZzfqbQai68Pvj5rjb2lBx+K3oTs9lMNvqcdfOvy+PHjo5Wuzz77LH3OOanx1e9wHesjxX0pi5eeW68he21uWM+nHXxPK1zpSsDXB1+fXn1P9UqXnmOtK1zjjK94qXhNhfXsg68Pvj41YyldCfj64OvTq+8pli4dv1XhioyveE11Zj374OuDr0/NWEpXAr4++Pr06ntqpUvHbl24IuMrXlO8Wc8++Prg61MzltKVgK8Pvj69+p5S6dJxt1K4InOLF+vZB18ffH1qxlK6EvD1wdenV99TKV065tYKV2RO8WI9++Drg69PzVhKVwK+Pvj69Op7CqVLx9tq4YpMLV6sZx98ffD1qRlL6UrA1wdfn159ey9dOtbWC1dkSvFiPfvg64OvT81YSlcCvj74+vTq23Pp0nF6KVyR2uLFevbB1wdfn5qxlK4EfH3w9enVt9fSpWP0VrgiNcWL9eyDrw++PjVjKV0J+Prg69Orb4+lS+N7LVwRt3ixnn3w9cHXp2YspSsBXx98fXr17a10/du//Vv3hSviFC/Wsw++Pvj61IyldCXg64OvT6++PZUujfvDP/zDkyhckUPFi/Xsg68P8+tTM5bSlYCvD74+vfr2Uro05lSucI1zXfFiPfvg64OvT81YSlcCvj74+vTq20Pp0uNPtXBF9hUv1rMPvj74+tSMvaUHH4rehOz2Uw2+px186/L48eOjla7PPvssfc7a6H8YreMtmZ///Pvpa58SHSt7jjl56623du6s59MOvqcVrnQl4OuDr0+vvj1c6To7O7tSSJbI2dl3nx05f/210bGy55gTOQvWsw++Pvj61IyldCXg64OvT6++vf3Xi3N948reMUqXjp3R0ncqrcbi64Ovz1pjKV0J+Prg69OrL6VrfihdV8HXB1+fHnwpXQn4+uDr06svpWt+KF1XwdcHX58efCldCfj64OvTqy+la34oXVfB1wdfnx58KV0J+Prg69OrL6VrfihdV8HXB1+fHnwpXQn4+uA78PHHH+/+YFXefPPN8y+//PL5PReUY99///3d4959993zr7766vmt+xk/r479zjvvnH/xxRfPb9nPXF9K1/xQuq6Crw++Pj34UroS8PXB9wIVLiVQqRoXqhirf5sqK2XXMX5eStd+5vpSujxajcXXB1+ftcZSuhLw9cE3R2VIpagsVjFW5cy9whWMn5fStZ+5vpQuj1Zj8fXB12etsZSuBHx98M3JrmZpbHysGImrY3p8ebseF+gYP/3pT88/+eST89u3b+8K229/+9srpSvGl1fbgrm+lK75oXRdBV8ffH168KV0JeDrg2+OSlNZnESMHV/pUmFSmYoCpdt1f4xX6bp///6VMeWVrvH4MXN9KV3zQ+m6Cr4++Pr04EvpSsDXB9+vs+/jwxhb3h8Fa3yFSgUqPp6M0qVyFUTpiqtf5X1j5vpSuuaH0nUVfH3w9enBl9KVgK8PvldRedr3S/IxNitd49Kk0vXgwYPdVx1LHy+WV7J0m55Hf5CPr6iNmetL6ZofStdV8PXB16cHX0pXAr4++A5cV7hEjJ1ypSsrXbpfZU3POR5fMteX0jU/lK6r4OuDr08PvrckeMzoxWS3O2k1dk7w9XNKvn/7t397fu/evfNf//rXX7vv4cOH5y+99NL5559/fvnYP/3TP92VqPL+f/mXf9n9rNt1vx6nn3VMla64P277kz/5k91tisbH45eMfP/pn/7paKXr0aNHe583u/3Y0fNqPo5VunTsfc+b3X7szHneVmPnBF8/+PqpGcuVrgR8ffC9+lFfmbjqFb/ortIlyitdgR5Tji2vXF13pStu01c9R/ZR41xfrnTND1e6roKvD74+PfhSuhLw9cHXp1dfStf8ULqugq8Pvj49+FK6EvD1wdenV19K1/xQuq6Crw++Pj34UroS8PXB16dXX0rX/FC6roKvD74+PfhSuhLw9cHXp1dfStf8ULquct1Y/X7ie++9t/u/Luj3Isf/nErmq8cc+qdTxBZ9D8F+5dODL6UrAV8ffH169aV0zc8SpSv+Y4vxPw8SvrrdKR4lc97nY42N0vWb3/xm9x+M6HvdFv+xiN6DSPkfq1C6vg6+PmuNpXQl4OuDr0+vvpSu+ZlbulQ49I/lKqdSulSWsv/qN0v5v7nSP7sx9qR05eDrs9ZYSlcCvj74+vTqS+manzmlK/4B3U8//TT9h3TDt8fSJR99LdHP8ij/SZWSsnTJWe9rluy9aOk7FfYrnx58KV0J+Prg69OrL6VrfuaUrihT+/7vBeEbjyuLyPjfgys/otPXv//7v7/8Px+I+AhTKUvL+KqUnkOvWY+Pj/iC8rZ4zeNjaqzu31e6ytvDKciudOn+8jH6fvwYMWddtRrLfuXTgy+lKwFfH3x9evWldM3P1NKlkhSlyCldeo64Px4f5UPHUBkq7//Zz352WZDiI8z4GE/zHt//4he/uCxBKlUqbPrHfuOYuk2Ur3H8/OV98o2xes0R3a9foNdX3a/E94FbusqfgznrqtVY9iufHnwpXQn4+uDr06svpWt+ppQulZT4JfL4OUpLSfjqdt2vxwXlVSd9P77/n//5n6+ULpWpKFD70GNVBOP/sKACFCWoLG7lcwd6jXqsfHV7Waji9enn8NZjx75Z6dLP5evWmPE4MWddtRrLfuXTgy+lKwFfH3x9evWldM3PlNKlEqExWcrSEb5RaEpUXOJKWXa/itO+jxfL0qJx5fMrKmxi33Pse/0qVk+fPt09Xo+NEhilSz/r9o8++ujKawvGpUuPL8up0OsoX38wZ121Gst+5dODL6UrAV8ffH169aV0zc+U0jVG5UKlZFwmwrcsPEFZZHR/fB+UV7pKVGDiqpdSPkZf9XOUrnhd8Yv+erwYjyuRr57jww8/fH7LxePHhS2OVZYolS7dp5TPW3qVjy+Zs65ajWW/8unBl9KVgK8Pvj69+lK65ucYpSt+/ou/+Ivdz7pdzxFFJcpRPL4sUkL3379//7IY6fa4L44dt5XlKZ4nSpfQbfpYsbwyNX5+oe91PPnq+/F9ceVLz63XGlevdPs//uM/7m4rHcdOgR5fHjuYs65ajWW/8unB95YefCh6E7LbTzX4nnbwrUuUkGOUrvgDeMnM9X306NHutR2jdOnY2XM60Udy+sX3X/7yl1d+VunSz7r95z//+S56LkXfl8dQUYr7VLj0809/+tPzf//3f788Xja2PObf/M3fXI6N+/Ux5fe///3L1xbRcfXYGFu+9j//8z/fjYtja7zWml6DbtNj9b2OEY/V2JjfOPb4OcOjfH09h/3qtMKVrgR8ffD16dWXK13zs8SVrn3M8VUxGX805zLnNatAlR8tirjCVX5EqqtVet/K1yjf7KqdrqrpsePHl8x5za3Gsl/59OBL6UrA1wdfn159KV3zs4XSpWISH9/Fz7pSlH0M5zDnNbec36ng64PvfihdCfj64Ouz1tj/+q//Ov/JT36y+0N+yRyjdC2Zs7OzZ8eeP7+nfKVLV4bK90wfzU2l1bnAfuWDr89aYyldCfj64Ouz1liVrtdee+3KH67z89/O//qvf/Ds6HmpqM1f/dX3d8fMn2ta5Czmzu8pl64xPaznMfj64Ouz1lhKVwK+Pvj6rDlWv0x89+7d3R/0d+/+3rOff/zs1rwQ9Bo5ye3C8e7OWcydX0qXR6ux+Prg67PWWEpXAr4++PqsPfaUi9e+wiXmzi+ly6PVWHx98PVZayylKwFfH3x9WoxVGYl/2+hUitd1hUvMnV9Kl0ersfj64Ouz1lhKVwK+Pvj6tBqr/zz/VK54HSpcYu78Uro8Wo3F1wdfn7XGUroS8PXB16el7yl81OgULjF3fildHi3X81Tw9cHXp2YspSsBXx98fVr79ly83MIl5s4vpcuj9XqeAr4++PrUjKV0JeDrg6/PFnx7LF41hUvMnV9Kl8cW1nMt+Prg61MzltKVgK8Pvj5b8e2peNUWLjF3fildHltZzzXg64OvT81YSlcCvj74+mzJt4fiNaVwibnzS+ny2NJ6dsHXB1+fmrGUrgR8ffD12ZrvlovX1MIl5s4vpctja+vZAV8ffH1qxt7Sgw9Fb0J2+6kG39MOvkOePHlyfufOnU0Vr7Jw6bXpNWavfV/mzu+jR4+OVrp07Ow554T1fNrB97TCla4EfH3w9dmq75aueM25whXMnV+udHlsdT1fB74++PrUjKV0JeDrg6/Pln23ULzGV7imFC4xd34pXR5bXs/7wNcHX5+asZSuBHx98PXZum/L4jW+wqWPFKcyd34pXR5bX88Z+Prg61MzltKVgK8Pvj49+LYoXuPCpdfQcn4pXR6txuLrg6/PWmMpXQn4+uDr04vvmsUrK1yi5fxSujxajcXXB1+ftcZSuhLw9cHXpyffNYrXvsIlWs4vpcuj1Vh8ffD1WWsspSsBXx98fXrzVQk61j8ncV3hEi3nl9Ll0Wosvj74+qw1ltKVgK8Pvj49+uoX2pe+4nWocImW80vp8mg1Fl8ffH3WGkvpSsDXB1+fXn2X/KjRKVyipS+ly6PVWHx98PVZayylKwFfH3x9evZdoni5hUu09KV0ebQai68Pvj5rjaV0JeDrg69P775zildN4RItfSldHq3G4uuDr89aYyldCfj64OtzCr5Tildt4RItfSldHq3G4uuDr89aYyldCfj64OtzKr41xWtK4RItfSldHq3G4uuDr89aYyldCfj64OtzSr5O8ZpauERLX0qXR6ux+Prg67PW2Ft68KHoTchuP9Xge9rBd5non5PY9+94lYVLj9Fjs2McI3N9Hz16tHvdx4iOnT3nnLCeTzv4nla40pWArw++Pqfom13xmnOFK2jpq9y+fftKWVoiOuY+r5a+U2k1Fl8ffH3WGkvpSsDXB1+fU/Uti9e3vvXCLvpeV7imFC7B/Prg64OvD74+NWMpXQn4+uDrc8q+ZfFS9L0+UpwK8+uDrw++Pvj61IyldCXg64Ovz6n7qni98sor56+++uru+1P3HYOvD74++Pr04EvpSsDXB18ffH3w9cHXB18ffH1qxlK6EvD1wdcHXx98ffD1wdcHX5+asZSuBHx98PXB1wdfH3x98PXB16dmLKUrAV8ffH3w9cHXB18ffH3w9akZS+lKwNcHXx98ffD1wdcHXx98fWrGUroS8PXB1wdfH3x98PXB1wdfn5qxlK4EfH3w9cHXB18ffH3w9cHXp2YspSsBXx98ffD1wdcHXx98ffD1qRlL6UrA1wdfH3x98PXB1wdfH3x9asZSuhLw9cHXp7Xv2dnZ5f+mh2wjmhPBeva5ib6cu9tLnLuiZn5vaUKPGb2Y7HYnrcbOCb5+8PWzhG+2cZD20dywntdJr77ZuiHtE/NTM79c6UrA1wdfn9a+sVG8/Q/nZAOJ+RCsZ5+b6Mu5u62U566omV9KVwK+Pvj6tPZl495Wyo2b9exzE305d7eV8twVNfNL6UrA1wdfn9a+bNzbSrlxs559bqIv5+62Up67omZ+KV0J+Powvz6tfdm4t5Vy42Y9+9T66hee79+/f/706dNufTl3t5Xy3BU180vpSsDXB1+f1r5s3NtKuXGznn1qfeN9vnv37vmTJ0+e31pPS99wyNYRWT8xH0HN/FK6EvD1wdentS8b97ZSbtysZ59a33iflTt37uyueE2hpW+8/mwdkfUT8xHUzC+lKwFfH3x9WvuycW8r5cbNevap9Y33+e7d33v+9e6k4tXSNxyydUTWT8xHUDO/lK4EfH3w9Wnty8a9rZQbN+vZp9Y33uenT388q3i19A2HbB2R9RPzEdTML6UrAV8ffH1a+7Jxbyvlxs169qn1Hd7nt2cVr5a+4ZCtI7J+hjV1Qc38UroS8PXB16e1Lxv3tlJu3Kxnn1rf4X1+e5epxaulbzhk64isn2FNXVAzv5SuBHx98PVp7cvGva2UGzfr2afWd3ifL0qXMqV4tfQNh2wdkfUzrKkLauaX0pWArw++Pq192bi3lXLjZj371PoO7/NQupTa4tXSNxyydUTWz7CmLqiZX0pXAr4++Pq09mXj3lbKjZv17FPrO7zPV0uXUlO8WvqGQ7aOyPoZ1tQFNfNL6UrA1wdfn9a+bNzbSrlxs559an2H9/nrpUtxi1dL33DI1hFZP8OauqBmfm/pwYeiSc9uP9Xge9q5qb5s3NtKzMd4vmrD+Xt94n1+9q7vTVm89A+o6l+uz47VIvINh2wdkfUT85HN16FwpSsBXx98fVr7snFvKzEfgvXsU+s7vM954YocuuLV0jccsnVE1s+wpi6omV9KVwK+Pvj6tPZl495Wyo2b9exT6zu8z3nZKnNd8WrpGw7ZOiLrZ1hTF9TML6UrAV8ffH1a+7Jxbyvlxs169qn1Hd7nvGiNs694tfQNh2wdkfUzrKkLauaX0pWArw++Pq192bi3lXLjZj371PoO73NesrJkxaulbzhk64isn2FNXVAzv5SuBHx98PVp7cvGva2UGzfr2afWd3if84K1L+PipV+un8pc33DI1hFZP8OauqBmfildCfj64OvT2peNe1spN27Ws0+t7/A+5+XqupTFS/9V475/TuIQc33DIVtHZP0Ma+qCmvmldCXg64OvT2tfNu5tpdy4Wc8+tb7D+5wXq0O57pfrXeb6hkO2jsj6GdbUBTXzS+lKwNcHX5/Wvmzc20q5ca+5nlUaHj9+vMujR48uv69Nq7EPHz5Mb9+X4X3OS5WTucVr7vyGQ7aOyPoZ1tQFNfNL6UrA1wdfn9a+bNzbSrlxr7meX3zxxcvnvil54YV5pUuZU7zmzm94ZOuIrJ+Yj6BmfildCfj64OvT2peNe1spN+4113M879nZd29MPvjg9jPzvEzVZGrxmju/MWfZOiLrJ+YjqJlfSlcCvj74+rT2ZePeVsqNe831PDxvXizI9ZlSvObOb8xZto7I+hnOoQtq5pfSlYCvD74+rX3ZuLeVcuNecz0Pz5uXCnI4tcVr7vzGnGXriKyf4Ry6oGZ+KV0J+Prg69Pal417Wyk37jXX8/C8eaEgXmqK19z5jTnL1hFZP8M5dEHN/FK6EvD1wdentS8b97ZSbtxrrufhefMysYV89dXZ+bvvvnj+/vs/SO//+ONXdsnui3z55Vu7Y+hrdv8ScYvX3PmNOcvW0ZJ565dfnr/4x+/uvpa3/+Cd98/v/a/Prtym6HHfefnNy9f3zd+/fX7/f/9qd4y4rUx2DEW36zjj5x3nwYdfnL/09nvnZ3/31ZXb972+YyV8gpr5vaUHH4omPbv9VIPvaeem+sZGkW0ia+eVP/v48vVEdFv2WCfarL/3xju7TVk/axNWxo/bUsJ7PF+1qV3P8bzPXsVq+eKLB+e3b3/z8rk/++xe+riIypZKVXzVbTrGe++9tCtkUbrGx43Hx89lVMA0dvxcc1MWL/0DqvqX67P3fWo0v+GQraMlM6V0xeNVhFSI4hzU48tz8OWffXh5Xxad/4fOWT0m9ony+Pte37ES85HN16FwpSsBXx/m16e171obtxNtnNqs42+s2oz1t+SpG2fPpUusuZ6H581LxNJR0fnoox9eFh4Vrjff/M7eK1BRtvS9HqPHakxWumKMblOpKstceaVL0TGPUbqUQ1e85s5vzFm2jpaKzj2dk7ripK+v/+Wnl887Tpyn15WusgjFfff/z693j8+OuS+xT1x3/FalK6iZX0pXAr4++Pq09o2NIttE1s64dCnaOONvsbUZl64eUm7ca67n4XnzAnHsqDw9ePDt3dfxfWXhiuhx77zzvV2h2le64gqXHhN++1IWsyVzXfGaO7/x2rN1tFR07ulqlM5LFRh9H/eVV6n0uEOlS/ervOmr/jKl1z4+33Xfvr8Ylc8RiWPquZTyY81xpu4jbuJ5gpr5pXQl4OuDr09r39gosk1k7WhTPFS6xhtreZ/GaXzcpz8UrrvSpbHZcVomXo9Ycz0Pz5uXh2MnK1ZKXMnSla14jWV0tSwrXfuOt+aVrsi+4jV3fuM9yNbRUtF58dp7n1yWqPK+60pXeY6qYOkYOhfHxxhH9+scLfcART/r9nJ8nO9RuvQayvNb349L2jETvkHN/FK6EvD1wdentW9sFNkmsna0aZalSxumNuzY2GMzj4IUP+txsQGPN91yvH6O+8u/IetnfWxSbuitUm7ca67n4Xnz4nCMqFDF715FWcpSFqW4TY/f9/GivtfjwymueMXPZfS4Y5cuRcXrW996Yfec9+7pqtr8+Q2HbB0tEZ1Tukqlc2VcuuK+faUrHl8+To+J11wmxkWysqSfy3Nbif1C+fH/++3u/vI1Zsc5ZsInqJlfSlcCvj74+rT2jY0i20TWznhT1mYaBSzuH9+mjVW3a1Mf/01a3++70qXNuCxkW0m4izXX8/C8eWk4dlSK9v1OV1a6VKT2la5yrB5TXvHKjrVGytL1xhtvPLtt/vzGnGXraMlEiXrz/z65cgUrSxQfPV5fx6VLKY+dFaPxuTw+jyM//J+/2L2meK7yPiU79jET70FQM7+UrgR8ffD1ae0bG0W2iaydslRpEy2vasX98XrLxOY6LmTjzVqPU7Ljrbk5X5d4PWLN9Tw8b14ajp24OjUuTcq4KOmxKloqXFnpKh+vnz/99PXdz+FYRlfadIzxcy6Znj9eVHQejYuNzin9paU8nyLl46eULkWP030ar2PtOz/juZxCON4flk48T1Azv5SuBHx98PVp7RsbRbaJrB1ttOXGqI22vBo1vr+MHlt+XKho3LdffrC3dEXGz9My5ca95noenjcvDsdOlK7sF9qjROm++DhSP2vMvitduroVv+9VlqpxgTt2ev9FeqUsUXGbzsUfvvvRlY8Yy8eXBSjOLY2J28rsK1TxeH3N7ley1xbZV+iOlfAJauaX0pWArw++Pq19Y6PINpG1k5Wqsihp49YGXm6k8cu8sdHHBh1/Qy7LVHks/WJv3K6x2ccXLVJu3Guu5+F58/KwdFSEPvnktcufVZbi48UoYPGxYFaU9JhxoSpLl25XQYuPIcMvSxS4OM5Sua5wibnzG68/W0dLZlxsdP7FeapzpvwocKnoOeSm81Vf9xWv8Wsro7GUrue0+oNmzU2sBF8ffH2W8I2NIttE1k5WurSpqzjFphs/x+suN9XxffFfTEWZKkuXNunyb+P7NvW1E69HrLmeh+fNC8QxooIUz1v+PpdTurLbytKl2+O/eGzxO12HCpeYO7/x3mXraMmUxUbnyfiKss7B8i83is4zPVaPG5+Dca6V52M5Tk7u7eVrK29X9FhK13Na/UGz5iZWgq8Pvj5L+MZGkW0iZP2UG/ea63l43rxEtI6KU7zGiApWWa7i97OU+De/osCNx5ZZ+ve6nMIl5s5vvP5sHS2ZKDa6qjz+S1Ek/sKjkqNSVT5Ot8XP4xKmx37/f/zV7n65HCpJul+PK4+n7yldB2j1B82am1gJvj74+izhGxtFtomQ9VNu3Guu5+F58yJBvLiFS8yd35izbB2R9TOcQxfUzC+lKwFfH3x9WvuycW8r5ca95noenjcvE+RwagqXmDu/MWfZOiLrZziHLqiZX0pXAr4++Pq09mXj3lbKjXvN9Tw8b14oyPWpLVxi7vzGnGXriKyf4Ry6oGZ+KV0J+Prg69Pal417Wyk37jXXczzv2dl3b0w++OD2M/O8RNVkSuESc+c35ixbR2T9xHwENfN7Sw8+FE16dvupBt/Tzk31ZePeVmI+xvNVm9r1/Ad/8AeXz31T8sIL86/slYXrzp0750+ePEnf36Wj+Q2PbB2R9RPzkc3XoXClKwFfH3x9WvuycW8rMR9izfWsqzOPHz/e5dGjR5ff16bV2IcPH6a378vwPudlysnUK1zB3PkNh2wdkfUzrKkLauaX0pWArw++Pq192bi3lXLjZj371PoO73NeqA5lbuESc33DIVtHZP0Ma+qCmvmldCXg64OvT2tfNu5tpdy4Wc8+tb7D+5yXqusy/khxSuESc33DIVtHZP0Ma+qCmvmldCXg64OvT2tfNu5tpdy4Wc8+tb7D+5wXq30ZX+HS73BNZa5vOGTriKyfYU1dUDO/lK4EfH3w9Wnty8a9rZQbN+vZp9Z3eJ/zcpUl+0ixpW84ZOuIrJ9hTV1QM7+UrgR8ffD1ae3Lxr2tlBs369mn1nd4n/OCNc6+3+Fq6RsO2Toi62dYUxfUzC+lKwFfH3x9WvuycW8r5cbNevap9R3e57xklbnul+Zb+oZDto7I+hnW1AU180vpSsDXB1+f1r5s3NtKuXGznn1qfYf3OS9akesKl2jpGw7ZOiLrZ1hTF9TML6UrAV8ffH1a+7Jxbyvlxs169qn1Hd7nvGwphwqXaOkbDtk6IutnWFMX1MwvpSsBXx98fVr7snFvK+XGzXr2qfUd3ufphUu09A2HbB2R9TOsqQtq5pfSlYCvD74+rX3ZuLeVcuNmPfvU+g7v8/TCJVr6hkO2jsj6GdbUBTXzS+lKwNcHX5/Wvmzc20q5cbOefWp9h/d5euESLX3DIVtHZP0Ma+qCmvmldCXg68P8+rT2ZePeVsqNm/XsU+s7vM/TC5do6RsO2Toi62dYUxfUzC+lKwFfH3x9WvuycW8r5cbNevap9R3e5+mFS7T0DYdsHZH1M6ypC2rm95Ym9JjRi8lud9Jq7Jzg6wdfP0v4snFvKzEfmhvW8/ES7/Ozd/1K4bp9+/b5559/no7J0tI3HLJ1RNZPzEfMT838cqUrAV8ffH1a+7JxbysxH4L17FPrG+/z1CtcQUvfcMjWEVk/MR9BzfxSuhLw9cHXp7UvG/e2Um7crGefWt94n+cULtHSNxyydUTWT8xHUDO/lK4EfH3w9Wnty8a9rZQbN+vZp9Y33mflzp07kwqXaOkbrz9bR2T9xHwENfNL6UrA1wdfn9a+bNzbSrlxs559an3jfdYVridPnjy/tZ6WvuGQrSOyfmI+gpr5pXQl4OuDr09rXzbubaXcuFnPPrW+P/rRj85fffXV3RWuXn05d7eV8twVNfNL6UrA1wdfn9a+bNzbSrlxs559bqIv5+62Up67omZ+KV0J+Prg69Pal417Wyk3btazz0305dzdVspzV9TML6UrAV8ffH1a+7Jxbyvlxs169rmJvpy720p57oqa+aV0JeDrg69Pa9/YKMi2IljPPjfRN1s3pH2CmvmldCXg64OvT2vfs7OzdOMg7aI5Eaxnn5voy7m7vcS5K2rml9KVgK8Pvj74+uDrg68P8+uDr0/NWEpXAr4++Prg64OvD74++Prg61MzltKVgK8Pvj74+uDrg68Pvj74+tSMpXQl4OuDrw++Pvj64OuDrw++PjVjb+nBh6I3Ibv9VIPvaQff0w6+px18Tzun7suVrgR8ffD1wdcHXx98ffD1wdenZiylKwFfH3x98PXB1wdfH3x98PWpGUvpSsDXB18ffH3w9cHXB18ffH1qxlK6EvD1wdcHXx98ffD1wdcHX5+asZSuBHx98PXB1wdfH3x98PXB16dmLKUrAV8ffH3w9cHXB18ffH3w9fHHnp//f/MpZ6r4d/v6AAAAAElFTkSuQmCC" alt="" />

save命令和bgsave命令对比：

命令	save	bgsave
IO类型	同步	异步
是否阻塞	是	是
复杂度	O(n)	O(n)
优点	不会消耗额外内存	不阻塞客户端命令
缺点	阻塞客户端命令	需要fork，消耗内存

自动生成：通过配置，满足任何一个条件就会创建快照文件。

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" 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快照持久化选项：

多久执行一次自动快照操作，60s之内有1000次操作写入时执行
save
创建快照失败后是否仍然继续执行写命令
stop-writes-on-bgsave-error no
是否对快照文件进行压缩
rdbcompression yes
命名硬盘上的快照文件
dbfilename dump.rdb

最佳配置：

dbfilename dump-${port}.rdb
dir /bigdiskpath
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes

AOF持久化

快照持久化现存问题

耗时、耗性能：通过bgsave命令进行持久化的的时候，需要fork一个子进程，如果数据量很大的话，需要的内存也会相应的变大，内存的占用会导致Redis性能降低。

不可控、丢失数据：举个例子，上一次创建快照是11:00开始创建并创建成功。如果Redis在12:00开始创建新的快照，如果系统在未完成创建快照之前崩溃，11:00-12:00写入的数据将会丢失；如果系统在快照创建完成之后崩溃，那么12:00之后，创建快照的过程中的数据将会丢失。

什么是AOF

AOF持久化将被执行的写命令写到AOF文件的末尾，以达到记录数据的目的。Redis只要从头到尾重新执行一次AOF所有的命令就可以恢复数据。

AOF三种策略

always：每条Redis写命令都同步写入硬盘。

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" 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everysec：每秒执行一次同步，将多个命令写入硬盘。

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hMMbmOf1swczzXIO21n+se8/y/ffv2nfNtUP4eH1NMlf2r4mpCWscCvcWK2Epga/um/fKFtMRRBHYN/3IPvHgS+zPF5Dr+bcFWMdnb3rTXfp6XaPP/+vXruwesFih/j48ppsr+VXE1Ia1jgd5iRWwlsLV90375IrqPIwjsGv7lHnjxJPZnisl1/NuCrWKyt71pr/0c30fvDXYtlL/HxxRTZf+quJqQ1rFAb7EithLY2r5pv3wBPcStBXYN/3IPvHgS+zPF5Dr+bcFWMdnb3rTXfn4f4tL8V/4eH1NMlf17BRf2Ec6VY8ci/eH5K0L8vPXRRx/teOvWrfPvx0ru153da2b+Bgt76O3taET+4pN74MWT2J/0R+6vWtK/NbT5Pxtb9Ip7fWfnm7lV/it/xyT9kfvLUm+uJiT9QcCRNbh69er5GKfC++9fJq7gkifYWh9ZLOmL/AW4D148if1JfwBr+LcGyv82tua/8vf4SH8AJf+quJqQ1rFAbfKy/82bvz8Zvv76tTuW+6JZwy0EVuJ8fKQ/gDX8WwPO7eXJsXLL/Ff+Hh/pD6DkXxVXE9I6FqhN3tTfFxBxP3sLrMT5+JhycB3/1iDN7ce3uJ+1+a/8PT6mHCr7V8XVhLSOBWqTN/X3xUM8zJ4CK3E+PqYcXMe/NUhz+7EtHmZN/it/j48ph8r+VXE1Ia1jgdrkTf194RBj7CWwEufjY8rBdfxbgzS3H9dijNH8V/4eH1MOlf2r4mpCWscCtcmb+vuiIcbZQ2CPXZz/9d2fz/7+oSfPrv7Li2c3//fXC9dwjPNY+9/8w7WzP7/57YXrlmyLsTCm12YU0h/AGv6tQZrbj2kxzkj+H3v+rkFqQCR3//G51+7RAnzHOVyzbS+LKYfK/p2quPqnf3/vfC2WN/7rC7d9hBwTnziGc+zxiKTdRG3ypv6+YIh1vGyBPXZxRq5RLJHLXCvoFVQ4fuCpV4qFmIqr/Uhz+/Es1vFQ/s+WvyxUMF+pWLEPPWTeNs9lsnS/jtx7uTbM/Zf/+fH8oeyJ//5KxdUSshDy2FpgcUw6VMWV2MLLFNjZxLmGfGKlKPIY+QeyULLfmaP4tDeCEpc8fF0WuTZgDf/WIM3tx7JYz335P1v+Itc4H3POXt+Xc7Z9qbj6039+ek9hdoi8H3NtGJvrsDpAHblscl1Ayb9TFlfcaFs981wt8zFnIP1B1CZv6u8LhdjGyxLY2cS5hhBDiCKePJHLEGd82qfRf37lw915CqfN+z+++Pa5qOZvrijuKq4uIs3tx7HYxlL+z5S/zCHk1N899OfdnDZ/bO7hE8c4j3xD3uE885T5t6/gwbV8jtJ5uzYUU7x3l3iZec85gJJ/py6urEPtRuabbq/ZqhuOgjjjO8fcNwdI4eZ4W5BrIWqTN/X3RUJs52UI7EziXEubq8hL5mOJzEvkMX4aROGl4qoOaW4/hsV2evk/U/7y/og8+tN/fLKb0xZRzCnvPphf4/G+4sprw3tuPgfbYn34jutcm95cLaQVYku7ofieX8emY/NtYZWTos058Emxtu28oOpNroWoTd7U3xcIcRkhsL/73f27Pb5x48adcyqu9pGiaQsnCmjeNqcVVRVXMaS5/fgVlzHP/5ny197/WOTw/mmve0UMc5HtmX+W+f1z3xzUA9Dei9EWY+Phim2sDrDPZZL2ACX/Tl9c2c085Ch+t5U4izE6ybanQ+14IxDrA4na5E39fXEQl9GK62OPPXbnnIqrEpljzEnmY4nMd+TjHx57bieyFFWOpeJqP9LcfvyKy5jn/yz5690/S/dH5qElCxz2jxRXoB2Ta7D3aJC5jXbe/Zhze+u6DNIeoOTfKYsrK6Q4puO5wVyvJdowUKzYckyOUTomeX5Lci1EbfKm/r44iO30fhYAlgjsLOLcwlyAcYwc8wTUknmJp9dSzpMqri4ize3HsNhOL/9nyV+vGCJZ7LCNVyTl13icF0o5WVBxrlLu//Hf3jl76IU3d9f55wDs4/EyCy3OAZT8O21xhWM6j86gk0rOYXHF/l6Bxjl4nLcDMS+vbUGug6hN3tTfFwixjaXCClgisLOIcwuRZzZf81yzpGizDY6Ri+iPnLbnrbhvna8eaROwhn9rkOb241hs42U8WPXMX94fPeb3WJzjfRS053nvZP4hJ5GbbOuRbclSzuZ6QeKYOmDPXxa5TqDk3yu4sI8jF1cgA4LneGxJ5+YOBP/w6LO7TwYE58CnDRjLrcWa6/D8FSH73xlNXIlWWK9fv352+/Ztd+97E/mLT/rci6cRiPy0f6COvKSI5sLJPLY6wDFscWWvjUb6I/dXLenfGnLuOysRV+Jl5X+v/LX3Ont/Y07hPO+R3n2UtIUU2x0qrtgO8+PNFMfifJY4N1JxlfvLcuo3VyA3FefpjLzAss7lGCDa8Zh97bFXXLHdluRaCDiyBqm/LxRiHfe9sSJqfWSxpC/yF6DPvXjakla895E5zPaewPLaTMUVsIZ/a5Dm9uNZrOOh/J8hf22Bk+eOdy1ybzxUXHn3btCOna8H7UYqroCSf6cqrsTfaB0L1CZv6u+LhRhnpLAClgjsDOLcSoghBREiir+roChTRK0Ioy3a4TMXbBVXMaS5/ZgW47zsB6vR87eFzFPYs+9lhS2y2E7FlXiptI4FapM39fcFQ4wxWlgBSwRW4nx8TDm4jn9rkOb241qMsceDlfJ3TKYcKvtXxdWEtI4FapM39fdFQzzMmsIKWCKwEufjY8rBdfxbgzS3H9viYfZ6sFL+jsmUQ2X/qriakNaxQG3ypv6+cIj7WVtYAUsEVuJ8fEw5uI5/a5Dm9uNb3M+eD1bK3zGZcqjsXxVXE9I6FqhNXva/efP3J8PXX792x3JfLGvYUlgBSwRW4nx8pD+ANfxbA87t5cmxcsv8V/4eH+kPoORfFVcT0joWqE3eq1evno9xKrz/fuyXL5hRthZWwBKBlTgfH+kPYA3/1kD538YtHqyUv2OS/gBK/lVxNSGtY4Ha5IUofP755zveunXr/HstP/roI/d8hD37pv3yRTPCJYUVsERgJc7HxxST6/i3Bsz/WfLXskWv0l77uR3hVg9Wyt8xmWKq7F8VVxPSOhboLc7Eknl79k375QvnIS4trICt9kriPCZTTK7j3xZsFZO97U177ef3IW75YKX8HZMppsr+VXE1Ia1jgd5iRWwlsLV903754rmPVljxLy+3FFbAVnslcR6TKSbX8W8LtorJ3vamvfZzfB+3frBS/o7JFFNl/6q4mpDWsUBvsSK2Etjavmm/fAEtMRdW/C8tWrHVXkmcx2SKyXX824KtYrK3vWmv/TwvcYQHK+XvmEwxVfaviqsJaR0L9BYrYiuBre2b9ssXUY/eE+ss9lpInMdkisl1/NuCmeO5Bmmv/Vz3OMqDlfJ3TKaYKvtXxdWEtI4FeosVsZXA1vZN++ULac7STwGz2GshcR6TKSbX8W8LZo7nGqS99vM950gPVsrfMZliquxfFVcT0joW6C1WxFaCU9s37ZcvppalwgqYxV4LifOYTDG5jn9bMHM81yDttZ/zlqM9WCl/x2SKqbJ/r+DCPsK5cuxYpD88f9US/vXOHxO5X3d2by+tsOJvLPBTgDfeTKR/uQdePIn9SX/k/qrlKeSvZYu93Os7O7+XI+a/8ndM0h+5vyz15mpC0h8EHNkK+LcVS+bt2Tftly+q4L43VsQs9lrQv9wDL57E/kwxuY5/WzBzPNcg7bWf++Ch/N/aXtrgxZLYnymmyv5VcTUhrWOB3mJFbCU4tX3TfrUJKzGLvRYS5zGZYnId/7Zg5niuQdrr9vzf2l7a4MWS2J8ppsr+VXE1Ia1jgd5iRWwlOLV90361CSsxi70WEucxmWJyHf+2YOZ4rkHa6/b839pe2uDFktifKabK/lVxNSGtY4HeYkVsJTi1fdN+tQkrMYu9FhLnMZlich3/tmDmeK5B2uv2/N/aXtrgxZLYnymmyv5VcTUhrWOB3mJFbCU4tX3TfrUXVsAs9lpInMdkisl1/NuCmeO5Bmmv2/N/a3tpgxdLYn+mmCr7V8XVhLSOBXqLFbGV4NT2TfvVXlgBs9hrIXEekykm1/FvC2aO5xqkvZ7vwUr5OyZTTJX9q+JqQlrHAr3FithKcGr7pv1qL6yAWey1kDiPyRST6/i3BTPHcw3SXs/3YKX8HZMppsr+VXE1Ia1jgd5iRWwlOLV9uV9LCitgFnstJM5jkv4A1vBvC2aO5xpwr2d8sFL+jkn6Ayj5V8XVhLSOBXqLFbGV4NT25X4tKayAWey1kDiPSfoDWMO/LZg5nmvAvZ7xwUr5OybpD6DkXxVXE9I6FugtVsRWglPbl/sFXrt2ramwAmax10LiPCbpD2AN/7Zg5niuAfcanO3BSvk7JukPoORfFVcT0joW6C1WxFaCU9uX+wVh/fLLL++erccs9lpInMck/QGs4d8WzBzPNeBe439pM9uDlfJ3TNIfQMm/Kq4mpHUs0FusiK0Ep7bvo48+evbII4/shPVUb0bK4bFoc3gN/7Zg5niuAfMf/6/AVmxtr/J3LEbyV8XVhLSOBXqLFbGV4MjeOCTOY9LmsOI5DuWvH09iX0byV8XVhLSOBSRWcUic/ZgS+9LmsOI5DuWvH09iX0by9wqcd4hy7FikP+gfONf6qxeXzLtV3yWc2V7l8Fi0Oax47sOZ7VX+jsVI/la9uRLHIgHntgL+bcWSebfqe6r2evEjbk9A8RyH8lcciUDJv6Hi6ubNm+7A4naETwiJVRynaq9yeDwyhxXPcSh/xVF4KH9DxVUrZg7mFsjeOGRvHLI3Dtkbh+yNQ/bGIXt/g4qrDLI3Dtkbh+yNQ/bGIXvjkL1xyN44Sn1VXGWQvXHI3jhkbxyyNw7ZG4fsjUP2xlHqq+Iqg+yNQ/bGIXvjkL1xyN445N84ZG8cpb4qrjLI3jhkbxyyNw7ZG4fsjUP2xiF74yj1VXGVQfbGIXvjkL1xyN44ZG8csjcO2RtHqa+KqwyyNw7ZG4fsjUP2xiF745C9ccjeOEp9VVxlkL1xyN44ZG8csjcO2RuH7I1D9sZR6qviKoPsjUP2xiF745C9ccjeOGRvHLI3jlJfFVcZZG8csjcO2RuH7I1D9sYhe+OQvXH4fc/O/h9HsSbID5qEygAAAABJRU5ErkJggg==" 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no：由操作系统决定何时同步。

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" alt="" />

三种策略对比：生产环境中需要根据实际的需求进行选择。

命令	always	everysec	no
优点	不丢失数据	每秒一次fsync	不用管
缺点	IO开销较大，一般的SATA盘只有几百TPS	丢1s数据	不可控

AOF重写

随着Redis的运行，被执行的写命令不断同步到AOF文件中，AOF文件的体积越来越大，极端情况将会占满所有的硬盘空间。如果AOF文件体积过大，还原的过程也会相当耗时。为了解决AOF文件不断膨胀的问题，需要移除AOF文件中的冗余命令来重写AOF。

原生AOF	AOF重写
set hello world set hello java set hello redis incr counter inct counter rpush mylist a rpush mylist b rpush mylist c 过期数据	set hello redis set counter 2 rpush mylist a b c

AOF重写的两种实现方式：

• bgrewriteaof命令

bgrewriteaof命令和bgsave命令的工作原理相似：Redis创建一个子进程，然后由子进程负责对AOF文件进行重写。

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9S5LFr067RvCSV8WLkx7A/fR3In0dReswxz+c54KuDb0zzd5Q80SJqyf/GaYkWyLHYgup/67S/ndrr8oU7L1T5MdaKn7dzrBPTCokVk9JnikP4vv7665tXX311tCQZl/WdyxK+/h5H86lmvMTkya81vw69GOWvsT/96/wvQL4m+PWZP9/XgXx/LcTOz2IcYj4rHPN8ngO+OvjGNF2UytIzdhve4guiL7j5IlwmL0B+jO++98H2Ty9Mvt8y9pgv1LXj5+Ac48S0f5MoL0m5zxQ9X4gRS/j6exzNp5rxEmPXZX5de8kpr+c89hwvRfka4Pv0fYx97/Hta8bPxWA+6+Crg6+O+tpmi9KuhbPMd15//6LA5CUo2m8UW4Sfe+nmNm//2++2+7Jttg/7Mw9Faf5x7a6N/SvX5uC/PJ37THFsvsZar3Vff4+j+VQzXlrsGrLv/Ufp5V9w/Pvy9fa6/PVR2fJj5Nd+/jxLeQe6dvw8DOazDr46+Oqor71mT4xiJ+4XdXTB14otemOLZ1SKfAHed0H0ffnvKNmCbPu1P/O0UJSi8do3Nr7R9kPF7iTlJcn+c/wlfaZS23ftuK+/x9F8qhkvMXYN+Tb7Ot/m3+fx682v6zz2FyT7069/P4b96cUrf76llaJUjte+uarz+aoE37bS/O8o+eK3K75Q+t8ebYG0hbLcVxQvSL4f34ct2va9/ZmnhaLk2ADOxcZ3LvseN/+dJC9J50ZP+UxxLL45a73Wff09juZTzfh1bNeQbyuvPdtmj/s5W/Lrzfdhsef59/7a/PuoKPnz1oyfi8F81sFXB18d9bVHUZTUO0q+OF5mQcyLUr7d9mnvBUVpv+OOlSRL6TNFzxdixBK+/h5H84nUTz7nmc86+Orgq6O+9mj+qzdyfEVpV0mylD5T9HwhRizh6+9xNJ9I/eRznvmsg68OvjrqaylKR5R8kTVanphTJclS+kzR84UYsYSvv8fRfCL1k8955rMOvjr46qivpSgdUfJF1mh1YiolyVL6TNHzhRixhK+/x9F8IvWTz3nmsw6+OvjqqK+lKB1R8kXWaHFiqiXJUvpM0fOFGLGEr7/H0Xwi9ZPPeeazDr46+Oqor6UoHVHyRdZobWLuU5Ispc8UPV+IEUv4+nsczSdSP/mcZz7r4KuDr476WorSESVfZI2WJua+JclS+kzR84UYsYSvv8fRfCL1k8955rMOvjr46qivpSgdUfJF1mhlYs4pSZbSZ4qeL8SIJXz9PY7mE6mffM4zn3Xw1cFXR30tRemIki+yRgsTc25JspQ+U/R8IUYs4evvcTSfSP3kc575rIOvDr466mspSkeUfJE11p6YlylJltJnip4vxIglfP09juYTqZ98zjOfdfDVwVdHfS1F6YiSL7LGmhPzsiXJUvpM0fOFGLGEr7/H0Xwi9ZPPeeazDr46jK+O+lqK0hElX2SNtSam/Q9uL1uSLKXPFD1fiBFL+Pp7HM0nUj/5nGc+6+Crg6+O+lqK0hElX2SNNSam3Uk6PT3dnsdlSpKl9Jmi5wsxYglff4+j+UTqJ5/zzGcdfHXw1VFfe82eGMVOnEW2rfh4ROO1b2x8o+27YneSlipJFve5e/fuwXPnzp1we+3Yexi9t0vHx9ff42g+kfrx8SjHa9/MuX6POfj2ndZ9uaN0RPHxcGwA52Ljuw9L/E5SmevXH/tcpdy4cePcXWOJ8fXjRvOJ1I+Ph1Hz+s25zHHXei2+OvjqqK+lKB1R8kXWqDUxD1GSLD//+d9vzs6evzIpx2+KJcbXjxnNJ1I/+Rzo+YMlAl8dfHVqnDNF6YiSL7JGjYl5qJJ0FVOO3xRLjK8fM5pPpH7yOdDzB0sEvjr46tQ4Z4rSESVfZI1DT0xK0rIpx2+KJcbXjxnNJ1I/+Rzo+YMlAl8dfHVqnDNF6YiSL7LGIScmJWn5lOM3xRLj68eM5hOpn3wO9PzBEoGvDr46Nc6ZonREyRdZ41ATk5J0mJTjN8US4+vHjOYTqZ98DvT8wRKBrw6+OjXOmaJ0RMkXWeMQE7O1kvTpp69ceFtu3fr25ssvf3jxuH1t2/Ltn39+c3Ny8sz2+fZ6f+7acQeVJcbXjxnNJ1I/+Rzo+YMlAl8dfHVqnDNF6YiSL7LG0hOzpZL01Vdnm9u3b1w4l7l//63t88qilL/uww9ffGq/a8bPXWWJ8fVjRvOJ1E8+B3r+YInAVwdfnRrnTFE6ouSLrLHkxGz1TpLdGbI7RL7dyo9t92JUFiV/nZUlK035PteOnZdFZYnx9WNG84nUTz4Hev5gicBXB1+dGudMUTqi5IussdTEbK0kefmx8/E7R2OP5UXJvrdiVZarVlKO3xRLjK8fM5pPpH7yOdDzB0sEvjr46tQ4Z4rSESVfZI0lJubXX3+9efPNN7f7ffbZ66uXJIv/jpHfJcofy3+0ZnePvCjZ82/efG67vSxXraQcvymWGF8/ZjSfSP3kc6DnD5YIfHXw1akxJylKR5R8kTWWmJhWlF577bXtfo+5KPl7Y2ntd5M8fn4qS4yvHzOaT6R+8jnQ8wdLBL46+OrUOGeK0hElX2SNpSZmLz96e/jw1sVjLf3Xbh47L4vKEuPrx4zmE6mffA70/MESga8Ovjo1zpmidETJF1ljyYnZWlkqf2m73O6/rJ0XJfvaypM93uLvKdl5WVSWGF8/ZjSfSP3kc6DnD5YIfHXw1alxztfsBMfCIttWfDx8fGyQ8/G6bB48eHBeME62x1i7LOV3jsrkJagsSratLFP5fteMn3/03kdZYnz9mNF8IvWTz4Glr181lznuWq+9TPDVg28c6Y4SaSuODfJcbHwjWr2z5CnLT1SU8pLVUllyB5UlxtePSdqKcYjrV+Eyx13rtfjq4KujvnZnUTo7OwsvcrJebEycQ03M1spSL/ExVFlifLmG24tfwz1/sETgq4OvTo1z3lmU5sJA6bTqS1laPv5BqcJ81sFXB18dfHV69qUoJfB9GsrSsqEo7QZfHXx18NXBN4ailMA3hrK0XChKu8FXB18dfHXwjaEoJfAd51Bl6ec///vN2dnzVyYUpd3gq4OvDr46+MZQlBL47uYQZemb3/zGRXm4Krlx48a5uwbzWQdfHXx18NXp2ZeilMB3mqXLkpeHe/fuSbl79264XcmdO3fC7Uouc9zytfYeqjCfdfDVwVcHX52efSlKCXw17IP+9PR0kbLkRUmF8dXBVwdfHXx18NVp3ZeilMBX5+HDh4vcWaIo7QZfHXx18NXBV6fn8aUoJfDVseMu8WM4itJu8NXBVwdfHXx1evalKCXw1fHjXrYsUZR2g68Ovjr46uCr07MvRSmBr05+3MuUJYrSbnr3/ctf/rL57ne/ezEPlort0/atwvjq4KuDr07rvhSlBL465XHnliX/YFNhfHWOwfd3v/vdxRxYOr///e/TUaZhfHXw1cFXp3Xfa/bEKHbi0fZeg+/lYr/gve9/DecfatH+lg7j217sn0uw8X/77efC+TEnP/jBc9t93r9/PzxmL2E+9x182wp3lBL46owdd987S16UVBhfnWPw9TtKhyhK3FEaB18dfHV69qUoJfDV2XXcfcoSRWk3vftSlPoe3xJ8dfDVqXHOFKUEvjpTx1XLEkVpN737UpT6Ht8SfHXw1alxzhSlBL46ynGVskRR2k3vvhSlvse3BF8dfHVqnDNFKYGvjnrcqbJEUdpN774Upb7HtwRfHXx1apwzRSmBr84+x91VlihKu+ndl6LU9/iW4KuDr06Nc6YoJfDV2fe4Y2WJorSb3n0pSn2Pbwm+Ovjq1DhnilICX505x43KEkVpN737UpT6Ht8SfHXw1alxzhSlBL46c49rZSn/RykpSrvp3Zei1Pf4luCrg69OjTlJUUrgq3OZ49q/4O13lihKu+ndl6LU9/iW4KuDr06Nc6YoJfDVuew55z+GoyiN07svRanv8S3BVwdfnRrnTFFK4KuzxDlbWfr+97+/OTs7236vcMy+c+jdl6LU9/iW4KuDr06Nc6YoJfDVwVcH33EoSn2Pbwm+Ovjq1DhnilICXx18dfAdh6LU9/iW4KuDr06Nc75mT4xiJx5t7zX49h1828u9e/cOVpTu378fHrOXMJ/7Dr5thTtKCXx18NXBdxzuKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo15iRFKYGvDr46+I5DUep7fEvw1cFXp8Y5U5QS+Orgq4PvOBSlvse3BF8dfHVqnDNFKYGvDr46+I5DUep7fEvw1cFXp8Y5U5QS+Orgq4PvOBSlvse3BF8dfHVqnDNFKYGvDr46+I5DUep7fEvw1cFXp8Y5U5QS+Orgq4PvOBSlvse3BF8dfHVqnPM1e2IUO/Foe6/Bt+/g217u3bt3sKJ0//798Ji9hPncd/BtK9xRSuCrg6+O+tqvvvpqc/v27e2H/FTsefZ8f42VAufTTz/dnJycbH77299ePO7Pz/nyyy83t27d2j72ySefhMexx+15+7DPe8Udpfmv5frVwVcH3xiKUgJfnavm+8tf/vKiPOSlRCE/5w8//HCvfUSvzV//+eefb0tRXmimilK+H3ud7cOKkr3GvjbsuPY8itI0a72W61cHXx18YyhKCXx1rpKvlRIvFpY1ilJUkhwvSx988MG2EPnzyuRFyO8mWakyvFxRlPZnrddy/ergq4NvDEUpga/OVfK1EmEfvF4q9iU/532L0qNHjy7KT15kdrHrjpJ/b/vzWBn6+OOPn9iWP0ZR2s2xzWcDXx18dXr2pSgl8NW5Kr75nRxLXla8QHm8jBh+l8e2/eIXv9g+buUoL0p5aclfm/PrX/96+7hakoxdRcmZKn+1xoiiVHc+O/jq4KvTsy9FKYGvzlXxHStK5XaPFxIvSjdv3ty88MIL28fKouRlxV8zts+x2Ot+9rOfbb/Oi9RUUfJtvh/7/aT8+zJjZWqMfcaIolR3Pjv46uCr07MvRSmBr85V8i3vvvjv99g2/xFauc2LkuXBgwfb5xhehvyXp6d+tOV3lOx1Y3gxGvsv1/LYfuzc3n///e1rfLu7+Xn/9Kc/3X4/h33GiKJUfz4b+Oowvjo9+1KUEvjqXCXfsih5mShLTn63yJ9jd2rs94yc8q6R73OMfYqSHdMLm+UPf/hDeEfJnm/f23OsXFn8MYrS/hzbfDbw1cFXp2dfilICX52r5FsWpX3uKI0Vpc8+++ypfUTsW5T8XO355hsVJXvMj+9Ofl5lfL/7sM8YUZTqz2cDXx18dXr2pSgl8NW5Sr5lUTLGioUXkqmiZOXIYl9bYRn78du+RelPf/rT9r9gs6/NNypKDx8+3CYvSo6fN3eUdI5tPhv46uCr07MvRSmBr85V8o2KkuHbPXmZUYpS/v1YWfJ/6LI8tuNlK9rHLl+/A0ZResxVms8Gvjr46vTsS1FK4KuDr86+r83LjyW/G1RiRcvLTlnconiZy4vS1Ot2HT9iH1+K0vzXcv3q4KuDbwxFKYGvDr46+I5DUep7fEvw1cFXp8Y5U5QS+Orgq4PvOBSlvse3BF8dfHVqnPM1O8GlYwePtitZ67WXCb568NXTu++vfvWrgxWlu3fvhseMwvjqwVcPvnVS45y5o5TAVwdfHXzH4Y5S3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1cF3HIpS3+Nbgq8Ovjo1zpmilMBXB18dfMehKPU9viX46uCrU+OcKUoJfHXw1enJ9+uvv9786Ec/2haRJXOIorRkzs7Ozvcd09P4KuCrg69O674UpQS+Ovjq9ORrRem1114Ly8T8fGPzL//y4vne4+Kzb372sxe2+4yPNS/mPEZP46uArw6+Oq37XrMnRrETj7b3Gnz7Dr7L5OHDh5vT09NtgXj55W9tHj1653wZiUvLscaczM0czdWco/dizTCf+w6+bYU7Sgl8dfDV6dH30aNH50Xi5S7LUl6SzNFcd9Hj+O4CXx18dVr3pSgl8NXBV6dX3x7L0r4lyeh1fMfAVwdfndZ9KUoJfHXw1enZt6eyNKckGT2PbwS+OvjqtO5LUUrgq4OvTu++PZSluSXJ6H18S/DVwVendV+KUgJfHXx1roLvMZely5Qk4yqMbw6+OoyvTuu+FKUEvjr46lwV32MsS5ctScZVGV8HXx18dVr3pSgl8NXBV+cq+VrROJZ/OiAvSXbOc0qScZXG18BXB1+d1n0pSgl8dfDVuWq+9m8OtX5nqbyTZOc8l6s2vvjq4KvTui9FKYGvDr46V9G35R/DlSXJzpXx1cFXB1+d1n0pSgl8dfDVuaq+LZalqCQZjK8Ovjr46rTuS1FK4KuDr85V9m2pLI2VJIPx1cFXB1+d1n0pSgl8dfDVueq+LZSlXSXJYHx18NXBV6d1X4pSAl8dfHXwXbcsTZUkg/HVwVcHX53WfSlKCXx18NXB9zFrlCWlJBmMrw6+OvjqtO57zZ4YxU482t5r8O07+K4f+8/wa/07S3lJsmPasaNzOtYwn/sOvm2FO0oJfHXw1cH3SWrcWVLvJDmMrw6+OvjqtO5LUUrgq4OvDr5Pc8iytG9JMhhfHXx18NVp3ZeilMBXB18dfGMOUZbmlCSD8dXBVwdfndZ9KUoJfHXw1cF3nCXL0tySZDC+OvjqML46rftSlBL46uCrg+9ulihLlylJBuOrg68Ovjqt+1KUEvjq4KuD7zSXKUuXLUkG46uDrw6+Oq37UpQS+Orgq4OvhhWcff/pgLwknZyczCpJBuOrg68Ovjqt+1KUEvjq4KuDr479W0fqnaXyTtKDBw/Ot8+D8dXBVwdfndZ9KUoJfHXw1cFXx16r/BiuLEn2GsZXB18dfHV69qUoJfDVwVcHXx1/7a6yFJUkg/HVwVcHX52efSlKCXx18NXBVyd/bVSWxkqSwfjq4KuDr07PvhSlBL46+Orgq1O+Ni9Lzz57fZuoJBmMrw6+Ovjq9OxLUUrgq4OvDr460WvzsjRWkgzGVwdfHXx1evalKCXw1cFXB1+dsddaMXrllVc2r776aliSDMZXB18dfHV69r1mT4xiJx5t7zX49h18+w6+fQffvtO6L3eUEvjq4KuDrw6+Ovjq4KuDbwxFKYGvDr46+Orgq4OvDr46+MZQlBL46uCrg68Ovjr46jCfdfCNoSgl8NXBV2dt37Ozs4v/Yoy0ERsTg/ms04Mv12J7effdd9Po7IailMBXB1+dtX2jxYGsH4P5rNODbzQPyPpRoCgl8NXBV2dtX18M3vuvDWkg+eLMfNbpwZdrsa3k1+IUFKUEvjr46qzty+LcVvLFmfms04Mv12Jbya/FKShKCXx18NVZ25fFua3kizPzWacHX67FtpJfi1NQlBL46uCrs7Yvi3NbyRdn5rOG/RL0G2+8Mfqvsk/Rii/XYlvJr8UpKEoJfHXw1Vnbl8W5reSLM/NZw9+zsf/P3xSt+LpHNC9I/fh4KFCUEvjq4Kuzti+Lc1vJF2fms4a/Z5Y5ZakVX3eI5gWpHx8PBYpSAl8dfHXW9mVxbiv54sx81vD37OWXv5X+3K8steLrHtG8IPXj46FAUUrgq4Ovztq+LM5tJV+cmc8a/p49evTOrLLUiq97RPOC1I+PhwJFKYGvDr46a/uyOLeVfHFmPmsM79l7s8pSK77uEc0LUj/DvJrmml1wS8cmSLRdyVqvvUzw1YOvniV8WZzbio+HjQ3zWYu/Z+fv4DZ5WTo5Odk8ePAgfJ2nFV/3iOYFqR8fj3yMxsIdpQS+OvjqrO3L4txWfDwM5rPG8J49LkqWfe4steLrHtG8IPUzzKtpKEoJfHXw1Vnbl8W5reSLM/NZY3jPhqJkUctSK77uEc0LUj/DvJqGopTAVwdfnbV9WZzbSr44M581hvfsyaJkUcpSK77uEc0LUj/DvJqGopTAVwdfnbV9WZzbSr44M581hvfs6aJkmSpLrfi6RzQvSP0M82oailICXx18ddb2ZXFuK/nizHzWGN6zuChZdpWlVnzdI5oXpH6GeTUNRSmBrw6+Omv7sji3lXxxZj5rDO9ZXJI8Y2WpFV/3iOYFqZ9hXk1DUUrgq4Ovztq+LM5tJV+cmc8aw3sWF6Q8UVlqxdc9onlB6meYV9NQlBL46uCrs7Yvi3NbyRdn5rPG8J7F5ahMWZYePnx4vn0eS/q6RzQvSP0M82oailICXx18ddb2ZXFuK/nizHzWGN6zuBhFycvS6enpxY/h9mVJX/eI5gWpn2FeTUNRSuCrg6/O2r4szm0lX5yZzxrDexaXorHs+gVvlSV93SOaF6R+hnk1DUUpga8Ovjpr+7I4t5V8cWY+awzvWVyIduWyZWlJX/eI5gWpn2FeTUNRSuCrg6/O2r4szm0lX5yZzxrDexaXoalcpiwt6ese0bwg9TPMq2koSgl8dfDVWduXxbmt5Ivz3PG1D/o7d+5s7t27Nyt3794NtytZ47XDexYXISVzy9KS1697RPOC1M8wr6ahKCXw1cFXZ21fFue2ki/Oc8f3xo0bF/u5Krl+/XJFyTKnLC15/bpLNC9I/fh4KFyzwYxiC220vdfg23euqi+Lc1vx8SjHa5/4Ps7Onr8y+eijk/OPq7gA7ZO8LNl/DWf/dED0Hh8iPm7RvCD14+MRjVUZ7igl8NXBV2dtXxbntuLjYcwd32EfcRkgu7PPnaUlr18ft2hekPoZrqNpKEoJfHXw1Vnbl8W5reSL89zxHfYRFwEyHbUsLXn9+rhF84LUz3AdTUNRSuCrg6/O2r4szm0lX5znju+wj7gEEC1KWVry+vVxi+YFqZ/hOpqGopTAVwdfnbV9WZzbSr44zx3fYR9xATjW3L//1oWb5cMPX9xu//TTV57YvisnJ89sPv/85lP7HstUWVry+vVzjOZFD/nhL7/cfPulW9vY19FzPC/++MPNM39zsrn58ecX2+xr22aP5c89VHw8FChKCXx18NVZ27eVxfmVf/704lzyvPWv98PnK/F92p/2vS2w+fctxr2NueM77CP+8J8bKxhWNGzfXlLKfPXV2eb27Sf/q7vyuWXh8dj2L7/84ebWrW+Hj48d04uSvT563GOv37coWXaVpSWvX/eM5sXS8dJhxxsrHmf/+dXmxj/cvjiv6Ll2feaPe8auW+Ua9HOzY7/z719si5V9/fa//Y6ipLLWa/HVwVdnbV9fDKKFombGipJlblmiKMUf/HOT37mxMmOlJn88L1Jl8ufvKkr5/jx23F0FJz8vK2lW1qLnXSZjZWnJ69cdonmxdPLrLbrDkxepMvnzx4rSG//y/54qWVPx69LPzfad30XijtIerPVafHXw1Vnb1xeDaKGoGV8cfbHM/zbr2/ZNuc9jiI+HMXd8h33EH/pz4neKrLDcvPncdv95scnvJOVlJb9D5HeEvCiVd4h23U0ai+9Dee2cu0l5orK05PXr5xnNiyXj15aVjudeurk9Zv6Xkfzasz/te9vuPzqz7V5WvCjtKi/+F5TyLzzR9vzcrBj5NTyWcp9Lxo+hQFFK4KuDr87avr4YRAtFzZSlJl+U88WwXDjzx/K/Bdti+73bn2y/9n3uOoYl+pt17fi5GHPHd9hH/IE/J363yErQb37zxnb/eSHy8hPdaSofGytKHtue76e8o+Tnkhc132bP9W2HSFmW7N9Zmks5vrZPSzQvloxfJ3aNvPF/frM9Zl6I7JqybdH1UD7m3+8qStFz/Norj+HPtfOzr+1xPzfuKO3B2h8sc8BXB1+dJXx9MYgWipopC5AnXxT9b6B5/G+eeUkqExWl/G/NnuiDoXb8XIy54zvsI/6wnxP/8Zb96Xdv8vLij0flx0uMP9+LUp68GNk+ysej5EXJ93noomSxsvTss9e3x3vjjTfOt82jHF/3iubFksmvAy8sfh3lj0eFxK8zf74XmzzldbTrGPanPy+/Ju25tu/vvvfBxXP82BQlgbU/WOaArw6+Okv4+mIQLRQ14wtnnnxBnFps/ev8b8ZerHyhzZ/vi3K+vxZi52cx5o7vsI/4g37fRMXIy4wXk6WL0r53lPz4U8nvgs1NXpRef/31823zKMfXzzGaF0sluo7GrpOlipIl36efQ36tWsqiVF6XfuzovA4R91GgKCXw1cFXZ21fXwyihaJm8oU0XzB98fZF0s83jz3HF3tbuMt9+j7Gvvf49jXj52LMHd9hH/EH/b6Jio3Hi4c/Jy845ev9Mf9+rLTMuaM0FS97ly1Kx/6jt6jYeLy4+HOiwlM+5t+XpaeMlyM/VlSELN/73/9389I/fbx9/LUPPhu95j2HLE1+DAWKUgJfHXx11vb1xSBaKGrGS4svfL4A+4LqC+3YAutFyV8flS0/Rl6I8udZ7Lj+2Brx8zDmju+wj/jDft/sKi5+p8eLiG3L7yrl2/3u01RRKlPeUZqTJYpSD7/M7ddJlPJas215Ecm3+zWkFiWLP9czdq3ZvqPr3L637fk5HTJ+ngoUpQS+OvjqrO3ri0G0UNSMl5h8EfRF3bf593nKvwXn+c7r72//9EXdj2F/ln/D9VCUnkxedPI7OFY2rHTY9rIARckLyq6i5D9WK18fxV7/xRfvXJzfWPzHdPa86EeDSqKSZCx5/fr5RvNiieRzPp/n0V8qouvJk5cif95UUfLn2fHtjpHvy4+Xx7ZRlM5Z68PhMq/FVwdfnbV9fTGIFoqa8RKTL4K+MNp2X1DLspQv0L4Piz3Pv/fX5t9HRcmft2b8XIy54zvsI/7Q3ydeaqxkWGmaeiwvVh4vUuXr1Ls7S9xR8mOW56JkrCQZS16//n5F82KJ5GXF5v/UY8o1MlWUomvYku+7PB973tEVJRvMKLbQRtt7Db5956r6+mIQLRSkfnw8yvHaJ76P8z0eVaKSNZVdd4jKHxmqxSxPXpJOT0+3v5MUvedLxM8zmhfHluguVZS8MPnzWitK0ViV4Y5SAl8dfHXW9vXFIFooSP34eBhzx3fYR/zhT7TsupPkLHn9+rhF84LUz3AdTUNRSuCrg6/O2r4szm0lX5znju+wj7gAkOkoJclY8vr1cYvmBamf4TqahqKUwFcHX521fVmc20q+OM8d32EfcQkgu6OWJGPJ69fHLZoXpH6G62gailICXx18ddb2ZXFuK/niPHd8fR9nZ89fmXz00cm5eVx89sk+JclY8vr1cYvmBakfHw8FilICXx18ddb2ZXFuK/niPHd8b9x4/J/tX6Vcv375O2j7liRjyevXXaJ5QerHx0OBopTAVwdfnbV9WZzbSr44zx1f+4C/c+fO5t69e7Ny9+7dcLuSNV47vGdxAVIypyQZS16/7hHNC1I/w7yahqKUwFcHX521fVmc20q+ODOfNYb3LC5BU5lbkowlfd0jmhekfoZ5NQ1FKYGvDr46a/uyOLeVfHFmPmsM71lchHblMiXJWNLXPaJ5QepnmFfTUJQS+Orgq7O2L4tzW8kXZ+azxvCexWVoLJctScaSvu4RzQtSP8O8moailMBXB1+dtX1ZnNtKvjgznzWG9ywuRFHykmT/4vackmQs6ese0bwg9TPMq2koSgl8dfDVWduXxbmt5Isz81ljeM/iUlSmvJNk/1uSuSzp6x7RvCD1M8yraShKCXx18NVZ25fFua3kizPzWWN4z+JilCf6cVsrvu4RzQtSP8O8moailMBXB1+dtX1ZnNtKvjgznzWG9ywuR56x30lqxdc9onlB6meYV9NQlBL46uCrs7Yvi3NbyRdn5rPG8J7FBcmy6xe3W/F1j2hekPoZ5tU012wwo9iFGG3vNfj2navqy+LcVnw8yvHaN1dpPvt7dv4Ohil/cdt+Jynaz9pxj2hekPrx8YjGqgx3lBL46uCrs7Yvi3Nb8fEwmM8aw3u2uySN/RMArfi6RzQvSP0M82oailICXx18ddb2ZXFuK/nizHzWGN6z/UuS0Yqve0TzgtTPMK+moSgl8NXBV2dtXxbntpIvzsxnjeE9278kGa34ukc0L0j9DPNqGopSAl8dfHXW9mVxbiv54sx81hjes/1LktGKr3tE84LUzzCvpqEoJfDVwVdnbV8W57aSL87MZ43hPdu/JBmt+LpHNC9I/QzzahqKUgJfHXx11vZlcW4r+eLMfNbw92xOSTJa8XWPaF6Q+vHxUKAoJfDVwVdnbV8W57aSL87MZw1/z+aUJKMVX/eI5gWpHx8PBYpSAl8dfHXW9mVxbiv54sx81vD3zLJvSTJa8XWHaF6Q+vHxUKAoJfDVwVdnbV8W57aSL87MZw1/z+aUJKMVX/eI5gWpHx8PBYpSAl8dfHXW9mVxbiv54sx81nj99ddnlySjFV+uxbaSX4tTUJQS+Orgq7O2L4tzW8kXZ+azTg++XIttJb8Wp6AoJfDVwVdnbV8W57aSL87MZ50efLkW20p+LU5BUUrgq4Ovztq+LM5tJV+cmc86PfhyLbaV/FqcgqKUwFcHX521fX0xIG3FYD7r9OAbzQOyfhSu2QRcOjZBou1K1nrtZYKvHnz1LOF769atcHEg68XGxMaG+VwnrfhyLbaXd99994kxGgt3lBL46uCrg68Ovjr46uCrg28MRSmBrw6+Ovjq4KuDrw6+OvjGUJQS+Orgq4OvDr46+Orgq4NvDEUpga8Ovjr46uCrg68Ovjr4xlCUEvjq4KuDrw6+Ovjq4KuDbwxFKYGvDr46+Orgq4OvDr46+MZQlBL46uCrg68Ovjr46uCrg28MRSmBrw6+Ovjq4KuDrw6+OvjGUJQS+Orgq4OvDr46+Orgq4NvDEUpga8Ovjr46uCrg68Ovjr4xlCUEvjq4KuDrw6+Ovjq4KuDb8Rm8/8B9gfxtxltmaAAAAAASUVORK5CYII=" 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• AOF重写配置

配置参数说明：

名称	含义
auto-aof-rewrite-min-size	AOF文件重写需要的尺寸
auto-aof-rewrite-percentage	AOF文件增长率

具体配置：

appendonly yes
appendfilename "appendonly-${port}.aof"
appendfsync everysc
dir /bigdiskpath
no-appendfsync-on-rwrite yes
auto-aof-rewrit-percentage
auto-aof-rewrite-min-size 64mb

快照持久化和AOF持久化的对比和选择

对比

命令	快照持久化	AOF持久化
启动优先级	低	高
体积	小	大
恢复速度	快	慢
数据安全性	丢数据	根据策略决定
轻重	重	轻

选择

在实际生产环境中，根据数据量、应用对数据的安全要求、预算限制等不同情况，会有各种各样的持久化策略；如完全不使用任何持久化、使用快照持久化或AOF持久化的一种，或同时开启快照持久化和AOF持久化等。此外，持久化的选择必须与Redis的主从策略一起考虑，因为主从复制与持久化同样具有数据备份的功能，而且主机master和从机slave可以独立的选择持久化方案。

（1）如果Redis中的数据完全丢弃也没有关系（如Redis完全用作DB层数据的cache），那么无论是单机，还是主从架构，都可以不进行任何持久化。

（2）在单机环境下（对于个人开发者，这种情况可能比较常见），如果可以接受十几分钟或更多的数据丢失，选择快照持久化对Redis的性能更加有利；如果只能接受秒级别的数据丢失，应该选择AOF。

（3）但在多数情况下，我们都会配置主从环境，slave的存在既可以实现数据的热备，也可以进行读写分离分担Redis读请求，以及在master宕掉后继续提供服务。在这种情况下，一种可行的做法是：master：完全关闭持久化，这样可以让master的性能达到最好slave：关闭快照持久化，开启AOF（如果对数据安全要求不高，开启快照持久化关闭AOF也可以），并定时对持久化文件进行备份（如备份到其他文件夹，并标记好备份的时间）；然后关闭AOF的自动重写，然后添加定时任务，在每天Redis闲时（如凌晨12点）调用bgrewriteaof。

参考

[1] Josiah L.Carlson. Redis实战[M]. 陈健宏译. 北京：人民邮电出版社，2015.

[2] Redis持久化方案该如何选型

[3] 一站式学习Redis-从入门到高可用分布式实践