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Re: Slow XFS write

To complete the description there is infos about the XFS partition:

meta-data=/dev/sda4              isize=256    agcount=11, agsize=268435455 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0
data     =                       bsize=4096   blocks=2920268544, imaxpct=5
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=521728, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

And infos about the RAID5 volume:

Virtual Drive: 0 (Target Id: 0)
Name                :
RAID Level          : Primary-5, Secondary-0, RAID Level Qualifier-3
Size                : 10.915 TB
Sector Size         : 512
Parity Size         : 5.457 TB
State               : Optimal
Strip Size          : 64 KB
Number Of Drives    : 3
Span Depth          : 1
Default Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy   : Disk's Default
Encryption Type     : None
Default Power Savings Policy: Controller Defined
Current Power Savings Policy: None
Can spin up in 1 minute: Yes
LD has drives that support T10 power conditions: No
LD's IO profile supports MAX power savings with cached writes: No
Bad Blocks Exist: No
Is VD Cached: No

Le 22/08/2018 à 11:41, Martin LEUSCH a écrit :

I have a NFS server with a hardware RAID5 on 3 HDD of 6 TB. I have a system partition with ext4 and a data partition with XFS.

I get only 10 MB/s in write speed on the XFS data partition and 80 MB/s on the system partition.

XFS mount option:

/dev/sda4 on /var/srv/nfs type xfs (rw,relatime,attr2,inode64,noquota)

Is there a way to have better performance? Is XFS a good choice in this situation?

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