Hello zfs-discuss,
A file system with a lot of small files.
zfs send fsA | ssh [EMAIL PROTECTED] zfs recv fsB
On a sending site nothing else is running or touching the disks.
Yet still the performance is far from being satisfactionary.
When serving data the same pool/fs can read over 100MB/s.
This is s10u3.
Maybe it's due that zfs send is single threaded and traversing lot
of small blocks just take a time and can't saturate underlying LUNs?
bash-3.00# zpool iostat 1
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 992 117 3.54M 1.76M
f3-3 270K 272G 0 0 46 86
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 165 0 384K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 166 0 453K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 176 0 423K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 169 0 402K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 159 0 356K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
f3-1 441G 783G 154 0 371K 0
f3-3 270K 272G 0 0 0 0
---------- ----- ----- ----- ----- ----- -----
^C
bash-3.00#
bash-3.00# zpool status
pool: f3-1
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
f3-1 ONLINE 0 0 0
c5t600C0FF000000000098FD516E4403200d0 ONLINE 0 0 0
c5t600C0FF000000000098FD55DBA4EA000d0 ONLINE 0 0 0
c5t600C0FF000000000098FD57F9DA83C00d0 ONLINE 0 0 0
errors: No known data errors
pool: f3-3
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
f3-3 ONLINE 0 0 0
c5t600C0FF000000000098FD514A1D9AF00d0 ONLINE 0 0 0
errors: No known data errors
bash-3.00#
--
Best regards,
Robert mailto:[EMAIL PROTECTED]
http://milek.blogspot.com
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