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Jul
30
comment ZFS reads on FreeBSD incredibly slow
Thanks for thinking about it.
Jul
29
comment ZFS reads on FreeBSD incredibly slow
It's not CPU-bound. The cp consumes 18% of one core out of 48 cores on the system, and the rest of the cores show over 90% idle. More data added to the question. (Not sure what you wanted from dstat. This is a FreeBSD machine for which dstat does not exist.)
Jul
29
revised ZFS reads on FreeBSD incredibly slow
cpu info
Jul
29
awarded  Yearling
Jul
28
answered How to configure a CISCO ASA to support the OS X VPN Client
Jul
24
comment ZFS reads on FreeBSD incredibly slow
@StefanLasiewski: Yeah, snapshots is the least probable item on the list, but it's worth pointing out just in case.
Jul
24
revised ZFS reads on FreeBSD incredibly slow
`cp` vs `cat`
Jul
24
revised ZFS reads on FreeBSD incredibly slow
more data
Jul
24
revised ZFS reads on FreeBSD incredibly slow
more data
Jul
24
comment ZFS reads on FreeBSD incredibly slow
16450060288B (15.32GB). iostat info shortly to be appended to question.
Jul
24
comment ZFS reads on FreeBSD incredibly slow
I think FRAG is not shown because spacemap_histogram is not enabled/active.
Jul
24
comment ZFS reads on FreeBSD incredibly slow
(The read finally completed in 25m29.27s.)
Jul
24
comment ZFS reads on FreeBSD incredibly slow
I cannot currently restart the machine. It's working well enough that bringing it down outside a maintenance window would be worse.
Jul
24
comment ZFS reads on FreeBSD incredibly slow
Good idea. I was able to copy the UFS-backed copy of the file onto the ZFS filesystem in 66.93s. I immediately started reading it back off. It's been at least 10m now and it's still not done. So it's not a problem with individual file fragmentation.
Jul
24
reviewed Approve Migrate Sonatype Nexus repo from one machine to another
Jul
24
reviewed Edit Missing NPN Extension
Jul
24
revised Missing NPN Extension
Removed +SSLv3 from advisory due to it being known to be insecure
Jul
24
reviewed Reject Merging Forms Authentication databases together
Jul
24
comment ZFS reads on FreeBSD incredibly slow
@MarkWagner: added
Jul
24
revised ZFS reads on FreeBSD incredibly slow
add `zpool list`