flashcache安装使用

flashcache安装使用：

github下载源码：

https://github.com/facebook/flashcache

#yum install dkms gcc make yum-utils kernel-devel

#unzip flashcache-master.zip

#cd flashcache-master/

#make && make install && make clean

#modprobe flashcache

#lsmod | grep flashcache

flashcache             97599  0 

dm_mod                 99168  4 flashcache,dm_multipath,dm_mirror,dm_log

#fdisk  -l    --dev/oczpcie_7_0_ssd为SSD，/dev/sdb为SAS 300g机械盘

Disk /dev/oczpcie_7_0_ssd: 480.1 GB, 480136395264 bytes

92 heads, 61 sectors/track, 167100 cylinders

Units = cylinders of 5612 * 512 = 2873344 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0006dbf6

               Device Boot      Start         End      Blocks   Id  System

/dev/oczpcie_7_0_ssd1               1      167101   468882174+  83  Linux

Disk /dev/oczpcie_7_0_ssd1: 480.1 GB, 480135346688 bytes

128 heads, 128 sectors/track, 57236 cylinders

Units = cylinders of 16384 * 512 = 8388608 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/sda: 146.8 GB, 146778685440 bytes

255 heads, 63 sectors/track, 17844 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000a0edb

   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1        4178    33554432   83  Linux

/dev/sda2            4178        5222     8388608   82  Linux swap / Solaris

/dev/sda3            5222       17845   101394496   83  Linux

Partition 3 does not end on cylinder boundary.

Disk /dev/sdb: 300.0 GB, 299966445568 bytes

255 heads, 63 sectors/track, 36468 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000e0cbd

   Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1       36468   292929178+  83  Linux

#flashcache_create cachedev -p back -b 4k /dev/oczpcie_7_0_ssd /dev/sdb1 --创建cachedev

cachedev cachedev, ssd_devname /dev/oczpcie_7_0_ssd, disk_devname /dev/sdb1 cache mode WRITE_BACK

block_size 8, md_block_size 8, cache_size 0

Flashcache metadata will use 2459MB of your 64414MB main memory

#mount /dev/mapper/cachedev /data01  --挂载使用

参考：http://blog.sina.com.cn/s/blog_5037eacb0102v140.html