Date: Mon, 29 Apr 2013 09:59:25 -0700 From: "Marc G. Fournier" <scrappy@hub.org> To: Rick Macklem <rmacklem@uoguelph.ca> Cc: freebsd-fs@freebsd.org Subject: Re: Initial NFS Test: Linux vs FreeBSD (769% slower) Message-ID: <5503E3D8-20A4-422E-A8E4-176DD64EB2D3@hub.org> In-Reply-To: <1904620729.1184886.1367020597750.JavaMail.root@erie.cs.uoguelph.ca> References: <1904620729.1184886.1367020597750.JavaMail.root@erie.cs.uoguelph.ca>
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On 2013-04-26, at 16:56 , Rick Macklem <rmacklem@uoguelph.ca> wrote:
> If you didn't unmount/remount between writing jboss to the server and
> timing the startup of it, please try it again after doing a =
dismount/mount.
> (Doing the dismount/mount on the Linux client resulted in the same # =
of
> reads as FreeBSD for a quick test I did, instead of none without the
> dismount/remount.)
'k, this one was tried on Friday, and even a full server reboot didn't =
make any difference in performance, whether the first run or subsequent =
ones =85 its just plain fast =85
> A few other things to do:
> - Time multiple startups after doing a mount, to see if it only the
> first one that is slow.
Tried =85 all are equally slow =85 best time so far has been ~230s =85 =
yup, after several start ups, its pretty consistently around the 240s =
mark =85
> - Capture the RPC counts for both clients by doing "nfsstat -c" before
> and after the startup.
FreeBSD:
Before:
Client Info:
Rpc Counts:
Getattr Setattr Lookup Readlink Read Write Create =
Remove
2745853 821481 973901 18 2230947 2098303 160726 =
4954
Rename Link Symlink Mkdir Rmdir Readdir RdirPlus =
Access
1862 0 0 14724 950 16272 0 =
329756
Mknod Fsstat Fsinfo PathConf Commit
12 30873 5 0 0
Rpc Info:
TimedOut Invalid X Replies Retries Requests
0 0 0 0 9430761
Cache Info:
Attr Hits Misses Lkup Hits Misses BioR Hits Misses BioW Hits =
Misses
26322016 2745853 20537972 973869 2373488 2225801 2618800 =
2097243
BioRLHits Misses BioD Hits Misses DirE Hits Misses Accs Hits =
Misses
1262 18 46863 15678 29941 0 22513185 =
329759
After:
Client Info:
Rpc Counts:
Getattr Setattr Lookup Readlink Read Write Create =
Remove
2745919 821481 973912 18 2230947 2098303 160726 =
4954
Rename Link Symlink Mkdir Rmdir Readdir RdirPlus =
Access
1862 0 0 14724 950 16272 0 =
329767
Mknod Fsstat Fsinfo PathConf Commit
12 30873 5 0 0
Rpc Info:
TimedOut Invalid X Replies Retries Requests
0 0 0 0 9430849
Cache Info:
Attr Hits Misses Lkup Hits Misses BioR Hits Misses BioW Hits =
Misses
26323022 2745919 20538207 973880 2374208 2225801 2618800 =
2097243
BioRLHits Misses BioD Hits Misses DirE Hits Misses Accs Hits =
Misses
1262 18 46863 15678 29941 0 22513489 =
329770
Okay, if I'm reading the above right =85 there doesn't look to be *alot* =
of difference between the Before n After =85 it doesn't look like its =
downing a whole lot of NFS ops =85 am I reading wrong?
> If the above doesn't give you any good hints w.r.t. why it is slow,
> you can capture packets during the startup for both clients and look
> at them in wireshark, to try and figure out what the difference =
between
> the Linux and FreeBSD clients are for this case.
If the above nfsstat output indicates this is warranted, then please =
provide more information on what I should run =85
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