遇到写入I / O时,zpool iostat -v中的日志列不会显示任何ZIL活动.这会导致将数据写入磁盘时的等待时间高于预期(在争用期间有时超过80毫秒).
- capacity operations bandwidth
- pool alloc free read write read write
- ---------------- ----- ----- ----- ----- ----- -----
- storage 1.88T 2.09T 3 3.01K 512K 39.3M
- mirror 961G 1.05T 0 1.97K 128K 20.8M
- mpathf - - 0 393 0 20.8M
- mpathg - - 0 391 128K 20.6M
- mirror 961G 1.05T 2 1.04K 384K 18.5M
- mpathi - - 1 379 256K 21.1M
- mpathj - - 0 281 128K 18.3M
- logs - - - - - -
- /zlog/zilcache 0 15.9G 0 0 0 0
- cache - - - - - -
- mpathk 232G 8M 1 0 130K 0
- mpathl 232G 8M 1 0 130K 0
- ---------------- ----- ----- ----- ----- ----- -----
我的/ zlog / zilcache设备从来没有任何IO.它是一个快速闪存的文件.当我从ZFS商店中删除它时,我可以编写和读取它,但ZFS似乎忽略它.
该设备看起来可用：
- pool: storage
- state: ONLINE
- scan: scrub repaired 0 in 19h31m with 0 errors on Wed Nov 19 07:39:03 2014
- config:
- NAME STATE READ WRITE CKSUM
- storage ONLINE 0 0 0
- mirror-0 ONLINE 0 0 0
- mpathf ONLINE 0 0 0
- mpathg ONLINE 0 0 0
- mirror-1 ONLINE 0 0 0
- mpathi ONLINE 0 0 0
- mpathj ONLINE 0 0 0
- logs
- /zlog/zilcache ONLINE 0 0 0
- cache
- mpathk ONLINE 0 0 0
- mpathl ONLINE 0 0 0
- errors: No known data errors
有什么方法可以配置ZFS来缓存对日志设备的写入以获得更快的确认？
谢谢
