SirHaxalot
Dabbler
- Joined
- Aug 27, 2012
- Messages
- 10
I mentioned having 90MB/s synchronous write in Samba/CIFS file copy (copying an ~15GB compressed file to a network share in Windows), thus the problem seems to be isolated to NFS.
The workload I'm planning to use this for is Visualization with VMWare ESXi, from where I connect with NFS. VMWare will be opening files with the O_SYNC flag and there's nothing I can do about that. The guests will also initiate NFS connections for /home and the likes but performance isn't as large of an issue there. After all, random read/write are the most important aspect and I get better performance there at ~500-1000 IOPS for write and between 1 000-10 000 IOPS for read (I'm guessing whether it's cached or not plays a huge role here).
Additionally, the SSDs I'm using are Agility 3 and are specified for 475MB/s sequential write and 50 000 - 80 000 4k random-write IOPS. I think they should be able to do it, but I guess I could try to disable the read cache and see if performance increases.
The workload I'm planning to use this for is Visualization with VMWare ESXi, from where I connect with NFS. VMWare will be opening files with the O_SYNC flag and there's nothing I can do about that. The guests will also initiate NFS connections for /home and the likes but performance isn't as large of an issue there. After all, random read/write are the most important aspect and I get better performance there at ~500-1000 IOPS for write and between 1 000-10 000 IOPS for read (I'm guessing whether it's cached or not plays a huge role here).
Additionally, the SSDs I'm using are Agility 3 and are specified for 475MB/s sequential write and 50 000 - 80 000 4k random-write IOPS. I think they should be able to do it, but I guess I could try to disable the read cache and see if performance increases.