liukuohao
Dabbler
- Joined
- Jun 27, 2013
- Messages
- 39
Ok guys,
I need some advice here.
After reading some information on the guide and internet, I have decided to start
a project of building FreeNAS for storing CCTV recording footage, using iSCSI protocol.
The type of RAID will be using ZFS RAID 1+0.
The benefit of using RAID 1+0 are as followings
1) Easy of adding more disk for increasing storage.
2) Faster write speed compares to ZFS RAIDZ & RAIDZ2.
There is 1 question that I failed to answer so far.....
Do I need ZIL (ZFS intent log) for my application?
According to: http://forums.freenas.org/threads/slideshow-explaining-vdev-zpool-zil-and-l2arc-for-noobs.7775/
Cyberjock recommends that ZIL can be completely avoid if necessary, since
recovery process will be complex to configure when you really need to recover
some data. At this point, I cannot tell whether the CCTV surveillance software
is doing synchronous writing or asynchronous.
Since my CCTV software will be doing mostly WRITE operations @ 90%, does having ZIL
improve the writing speed. Or it does not make any difference not having it.
Thank you.
I need some advice here.
After reading some information on the guide and internet, I have decided to start
a project of building FreeNAS for storing CCTV recording footage, using iSCSI protocol.
The type of RAID will be using ZFS RAID 1+0.
The benefit of using RAID 1+0 are as followings
1) Easy of adding more disk for increasing storage.
2) Faster write speed compares to ZFS RAIDZ & RAIDZ2.
There is 1 question that I failed to answer so far.....
Do I need ZIL (ZFS intent log) for my application?
According to: http://forums.freenas.org/threads/slideshow-explaining-vdev-zpool-zil-and-l2arc-for-noobs.7775/
Cyberjock recommends that ZIL can be completely avoid if necessary, since
recovery process will be complex to configure when you really need to recover
some data. At this point, I cannot tell whether the CCTV surveillance software
is doing synchronous writing or asynchronous.
Since my CCTV software will be doing mostly WRITE operations @ 90%, does having ZIL
improve the writing speed. Or it does not make any difference not having it.
Thank you.