[Gluster-users] 2.0.0rc4 performance/write-behind seems broken with flush-behind=on

[Raghavendra G]

Hi Kirby,

There are some significant changes to write-behind that went into repository
after 2.0.0rc4. Can you check with the latest code from repository or get
2.0.0rc6 from our internal releases at
http://ftp.gluster.com/pub/gluster/glusterfs/qa-releases/glusterfs-2.0.0rc6.tar.gz

regards,
On Fri, Mar 20, 2009 at 4:39 PM, Kirby Zhou <kirbyzhou at sohu-rd.com> wrote:

> 2.0.0rc4 performance/write-behind seems broken with flush-behind=on
>
> If you use flush-behind=on, it is a acceptable result that other client
> machines will not see your operations immediately.
> But it is not acceptable that the sequentially executed program cannot see
> the result immediately caused by the prior one on the same client machine.
>
> The later situation happens when I run rpmbuild over a glusterfs volume.
>
> If I run following commands with flush-behind = on, some error happens.
> ############
> [root at xen-727057 BUILD]# ( set -x ; rm -fr openssl-fips-0.9.8e;
> /usr/bin/bzip2 -dc /root/rpmbuild/SOURCES/openssl-fips-0.9.8e-usa.tar.bz2 |
> tar -xf -; cd openssl-fips-0.9.8e; /root/rpmbuild/SOURCES/hobble-openssl >
> /dev/null; patch -p1 -b --suffix .redhat <
> /root/rpmbuild/SOURCES/openssl-fips-0.9.8e-redhat.patch; patch -p1 -b
> --suffix .defaults < /root/rpmbuild/SOURCES/openssl-0.9.8a-defaults.patch;
> patch -p1 -b --suffix .krb5 <
> /root/rpmbuild/SOURCES/openssl-0.9.8a-link-krb5.patch; patch -p1 -b
> --suffix
> .soversion < /root/rpmbuild/SOURCES/openssl-0.9.8b-soversion.patch; )
> + rm -i -fr openssl-fips-0.9.8e
> + /usr/bin/bzip2 -dc /root/rpmbuild/SOURCES/openssl-fips-0.9.8e-usa.tar.bz2
> + tar -xf -
> + cd openssl-fips-0.9.8e
> + /root/rpmbuild/SOURCES/hobble-openssl
> find: crypto/idea/asm: No such file or directory
> find: crypto/mdc2/asm: No such file or directory
> + patch -p1 -b --suffix .redhat
> patching file Configure
> + patch -p1 -b --suffix .defaults
> patching file apps/openssl.cnf
> Hunk #1 succeeded at 107 (offset 8 lines).
> Hunk #3 succeeded at 153 (offset 8 lines).
> + patch -p1 -b --suffix .krb5
> patching file Makefile.org
> Hunk #1 succeeded at 420 (offset 154 lines).
> + patch -p1 -b --suffix .soversion
> patching file Makefile.org
> Hunk #2 FAILED at 278.
> Hunk #3 FAILED at 291.
> 2 out of 3 hunks FAILED -- saving rejects to file Makefile.org.rej
> patching file Configure
> Hunk #1 FAILED at 1327.
> 1 out of 1 hunk FAILED -- saving rejects to file Configure.rej
> ############
> You can see, the last 2 patch operates the same file "Makefile.org".
> ############
> [root at xen-727057 BUILD]# lsdiff
> /root/rpmbuild/SOURCES/openssl-0.9.8a-link-krb5.patch
> openssl-0.9.8a/Makefile.org
> [root at xen-727057 BUILD]# lsdiff
> /root/rpmbuild/SOURCES/openssl-0.9.8b-soversion.patch
> openssl-0.9.8b/Makefile.org
> openssl-0.9.8b/Configure
> ############
> If I run each of the command above manually, everything goes right.
> If the flush-behind is turned off, everything goes right too.
>
> #### client vol spec file
> volume 10.10.123.32-brick1
>  type protocol/client
>  option transport-type tcp/client
>  option remote-host 10.10.123.32
>  option remote-port 6986
>  option transport-timeout 5
>  option remote-subvolume brick1
> end-volume
> volume 10.10.123.32-brick2
> ....
> end-volume
>
> volume dht0-raw
>  type cluster/distribute
>  subvolumes 10.10.123.21-brick1 10.10.123.21-brick2 10.10.123.22-brick1
> 10.10.123.22-brick2 10.10.123.31-brick1 10.10.123.31-brick2
> 10.10.123.32-brick1 10.10.123.32-brick2
>  option lookup-unhashed yes
> end-volume
>
> volume dht0-io-cache
>  type performance/io-cache
>  option cache-size 128MB            # default is 32MB
>  option page-size 128KB             # 128KB is default option
> # option priority *.h:3,*.html:2,*:1 # default is '*:0'
> # option cache-timeout 2             # default is 1 second
>  subvolumes dht0-raw
> end-volume
>
> volume dht0-writebehind
>  type performance/write-behind
>  option aggregate-size 128KB        # default is 0bytes
>  option window-size 2MB             # default is equal to aggregate-size
>  option flush-behind on             # default is 'off'
>  subvolumes dht0-io-cache
> end-volume
>
> volume dht0
>  type features/filter
>  option read-only off
>  #option root-squashing enable
>  option fixed-uid 99
>  option fixed-gid 99
>  #option translate-uid 0=999
>  #option translate-gid 0=999
>  subvolumes dht0-writebehind
>  #subvolumes dht0-io-cache
> end-volume
> ############################
>
>
>
>
>
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>



-- 
Raghavendra G
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