[Gluster-users] Gluster 1.3.10 Performance Issues

Keith Freedman
Thu, 07 Aug 2008 18:48:47 -0000

At 08:20 AM 8/7/2008, Chris Davies wrote:
>I''m not convinced that this is a network or hardware problem.

it doesn''t sound like it to me either.  what''s the server
stats while
you''re untarring?

Hopefully one of thegluster devs will step in with some thoughts.


> >
> >
> > Hope that wasn''t confusing.
> >
> > At 10:05 PM 8/6/2008, Chris Davies wrote:
> >> A continuation:
> >>
> >> I used XFS & MD raid 1 on the partitions for the initial
tests.
> >> I tested reiser3 and reiser4 with no significant difference
> >> I reraided to MD Raid 0 with XFS and received some improvement
> >>
> >> I NFS mounted the partition and received bonnie++ numbers similar
to
> >> the best clientside AFR numbers I have been able to get, but,
> >> unpacking the kernel using nfsv4/udp took 1 minute 47 seconds
> >> compared
> >> with 12 seconds for the bare drive, 41 seconds for serverside AFR
and
> >> an average of 17 minutes for clientside AFR.
> >>
> >> If I turn off AFR, whether I mount the remote machine over the net
or
> >> use the local server''s brick, tar xjf of a kernel takes
roughly 29
> >> seconds.
> >>
> >> Large files replicate almost at wire speed.  rsync/cp -Rp of a
large
> >> directory takes considerable time.
> >>
> >> Both QA releases I''ve attempted of 1.4.0 have broken
within minutes
> >> using my configurations.  1.4.0qa32 and 1.4.0qa33.  I''ll
turn debug
> >> logs on and post summaries of those.
> >>
> >> On Aug 6, 2008, at 2:48 PM, Chris Davies wrote:
> >>
> >> > OS: Debian Linux/4.1, 64bit build
> >> > Hardware: quad core xeon x3220, 8gb RAM, dual 7200RPM 1000gb
WD
> >> Hard
> >> > Drives, 750gb raid 1 partition set as /gfsvol to be exported,
dual
> >> > gigE, juniper ex3200 switch
> >> >
> >> > Fuse libraries: fuse-2.7.3glfs10
> >> > Gluster: glusterfs-1.3.10
> >> >
> >> > Running bonnie++ on both machines results in almost identical
> >> numbers,
> >> > eth1 is reserved wholly for server to server communications.
Right
> >> > now, the only load on these machines comes from my testbed.
> >> There are
> >> > four tests that give a reasonable indicator of performance.
> >> >
> >> > * loading a wordpress blog and looking at the line:
> >> >
> >> > * dd if=/dev/zero of=/gfs/test/out bs=1M count=512
> >> > * time tar xjf /gfs/test/linux-2.6.26.1.tar.bz2
> >> > * /usr/sbin/bonnie++ /gfs/test/
> >> >
> >> > On the wordpress test, .3 seconds is typical.  On various
gluster
> >> > configurations I''ve received between .411 seconds
(server side afr
> >> > config below) and 1.2 seconds with some of the example
> >> > configurations.  Currently, my clientside AFR config comes in
at .
> >> 5xx
> >> > seconds rather consistently.
> >> >
> >> > The second test on the clientside AFR results in 536870912
bytes
> >> (537
> >> > MB) copied, 4.65395 s, 115 MB/s
> >> >
> >> > The third test is unpacking a kernel which has ranged from 28
> >> seconds
> >> > using the Serverside AFR to 6+ minutes on some
configurations.
> >> > Currently the clientside AFR config comes in at about 17
minutes.
> >> >
> >> > The fourth test is a run of bonnie++ which varies from 36
minutes
> >> on
> >> > the serverside AFR to the 80 minute run on the clientside AFR
> >> config.
> >> >
> >> > Current test environment is using both servers as clients
&
> >> servers --
> >> > if I can get reasonable performance, the existing machines
will
> >> become
> >> > clients and the servers will be split to their own platform,
so, I
> >> > want to make sure I am using tcp for connections to give as
close
> >> to a
> >> > real world deployment as possible.  This means I cannot run a
> >> client-
> >> > only config.
> >> >
> >> > Baseline Wordpress returns .311-.399 seconds
> >> > Baseline dd 536870912 bytes (537 MB) copied, 0.489522 s, 1.1
GB/s
> >> > Baseline tar xjf of the kernel, real  0m12.164s
> >> > Baseline Config bonnie++ run on the raid 1 partition: (echo
data |
> >> > bon_csv2txt for the text reporting)
> >> >
> >> > c1ws1,16G,
> >> >
66470,97,93198,16,42430,6,60253,86,97153,7,381.3,0,16,7534,37,++++
> >> +,++
> >> > +,5957,23,7320,34,+++++,+++,4667,21
> >> >
> >> > So far, the best performance I could manage was Server Side
AFR
> >> with
> >> > writebehind/readahead on the server, with aggregate-size set
to
> >> 0mb,
> >> > and the client side running writebehind/readahead.  That
resulted
> >> in:
> >> >
> >> > c1ws2,16G,
> >> >
> >>
>
37636,50,76855,3,17429,2,60376,76,87653,3,158.6,0,16,1741,3,9683,6,2591,3,2030,3,9790,5,2369,3
> >> >
> >> > It was suggested in IRC that clientside AFR would be faster
and
> >> more
> >> > reliable, however, I''ve ended up with the following
as the best
> >> > results from multiple attempts:
> >> >
> >> > c1ws1,16G,
> >> >
> >>
>
46041,58,76811,2,4603,0,59140,76,86103,3,132.4,0,16,1069,2,4795,2,1308,2,1045,2,5209,2,1246,2
> >> >
> >> > The bonnie++ run from the serverside AFR that resulted in the
best
> >> > results I''ve received to date took 34 minutes.  The
latest
> >> clientside
> >> > AFR bonnie run took 80 minutes.  Based on the website, I
would
> >> expect
> >> > to see better performance than drbd/GFS, but, so far that
hasn''t
> >> been
> >> > the case.
> >> >
> >> > Its been suggested that I use unify-rr-afr.  In my current
setup,
> >> it
> >> > seems that to do that, I would need to break my raid set
which is
> >> my
> >> > next step in debugging this.  Rather than use Raid 1 on the
> >> server, I
> >> > would have 2 bricks on each server which would allow the use
of
> >> unify
> >> > and the rr scheduler.
> >> >
> >> > glusterfs-1.4.0qa32 results in
> >> > [Wed Aug 06 02:01:44 2008] [notice] child pid 14025 exit
signal Bus
> >> > error (7)
> >> > [Wed Aug 06 02:01:44 2008] [notice] child pid 14037 exit
signal Bus
> >> > error (7)
> >> >
> >> > when apache (not mod_gluster) tries to serve files off the
> >> glusterfs
> >> > partition.
> >> >
> >> > The main issue I''m having right now is file creation
speed.  I
> >> realize
> >> > that to create a file I need to do two network ops for each
file
> >> > created, but, it seems that something is horribly wrong in my
> >> > configuration from the results in untarring the kernel.
> >> >
> >> > I''ve tried moving the performance translators
around, but, some
> >> don''t
> >> > seem to make much difference on the server side, and the ones
that
> >> > appear to make some difference client side, don''t
seem to help the
> >> > file creation issue.
> >> >
> >> > On a side note, zresearch.com, I emailed through your contact
> >> form and
> >> > haven''t heard back -- please provide a quote for
generating the
> >> > configuration and contact me offlist.
> >> >
> >> > ===/etc/gluster/gluster-server.vol
> >> > volume posix
> >> >     type storage/posix
> >> >     option directory /gfsvol/data
> >> > end-volume
> >> >
> >> > volume plocks
> >> >   type features/posix-locks
> >> >   subvolumes posix
> >> > end-volume
> >> >
> >> > volume writebehind
> >> >   type performance/write-behind
> >> >   option flush-behind off    # default is
''off''
> >> >   subvolumes plocks
> >> > end-volume
> >> >
> >> > volume readahead
> >> >   type performance/read-ahead
> >> >   option page-size 128kB        # 256KB is the default option
> >> >   option page-count 4           # 2 is default option
> >> >   option force-atime-update off # default is off
> >> >   subvolumes writebehind
> >> > end-volume
> >> >
> >> > volume brick
> >> >   type performance/io-threads
> >> >   option thread-count 4  # deault is 1
> >> >   option cache-size 64MB #64MB
> >> >   subvolumes readahead
> >> > end-volume
> >> >
> >> > volume server
> >> >     type protocol/server
> >> >     option transport-type tcp/server
> >> >     subvolumes brick
> >> >     option auth.ip.brick.allow 10.8.1.*,127.0.0.1
> >> > end-volume
> >> >
> >> >
> >> > ===/etc/glusterfs/gluster-client.vol
> >> >
> >> > volume brick1
> >> >     type protocol/client
> >> >     option transport-type tcp/client # for TCP/IP transport
> >> >     option remote-host 10.8.1.9   # IP address of server1
> >> >     option remote-subvolume brick    # name of the remote
volume on
> >> > server1
> >> > end-volume
> >> >
> >> > volume brick2
> >> >     type protocol/client
> >> >     option transport-type tcp/client # for TCP/IP transport
> >> >     option remote-host 10.8.1.10   # IP address of server2
> >> >     option remote-subvolume brick    # name of the remote
volume on
> >> > server2
> >> > end-volume
> >> >
> >> > volume afr
> >> >    type cluster/afr
> >> >    subvolumes brick1 brick2
> >> > end-volume
> >> >
> >> > volume writebehind
> >> >   type performance/write-behind
> >> >   option aggregate-size 0MB
> >> >   option flush-behind off    # default is
''off''
> >> >   subvolumes afr
> >> > end-volume
> >> >
> >> > volume readahead
> >> >   type performance/read-ahead
> >> >   option page-size 128kB        # 256KB is the default option
> >> >   option page-count 4           # 2 is default option
> >> >   option force-atime-update off # default is off
> >> >   subvolumes writebehind
> >> > end-volume
> >> >
> >> > _______________________________________________
> >> > Gluster-users mailing list
> >> > Gluster-users at gluster.org
> >> > http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
> >> >
> >> > >
> >>
> >>
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> >
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