[Gluster-users] write performance is not good

[Mingfan Lu]

I unmounted and remounted, it seems there is no BAD results.
Interesting.


On Tue, Jan 28, 2014 at 6:00 PM, Mingfan Lu <mingfan.lu at gmail.com> wrote:

> In the client's log, I found:
>
> [2014-01-28 17:54:36.839220] I [afr-self-heal-data.c:712:afr_sh_data_fix]
> 0-sh-ugc1-mams-replicate-7: no active sinks for performing self-heal on
> file /fytest/46
> [2014-01-28 17:55:05.251490] I [afr-self-heal-data.c:712:afr_sh_data_fix]
> 0-sh-ugc1-mams-replicate-7: no active sinks for performing self-heal on
> file /fytest/49
>
> the /fytest/46 & /fytest/49 are BAD files.
>
> What does "no active sinks for performing" means?
>
>
>
>
> On Tue, Jan 28, 2014 at 4:56 PM, Dan Mons <dmons at cuttingedge.com.au>wrote:
>
>> Is your write single or multi-threaded?
>>
>> If it's single threaded, try writing your files across as many threads
>> as possible, and see what the performance improvement is like.
>>
>> -Dan
>> ----------------
>> Dan Mons
>> Skunk Works
>> Cutting Edge
>> http://cuttingedge.com.au
>>
>>
>> On 28 January 2014 18:49, Mingfan Lu <mingfan.lu at gmail.com> wrote:
>> >
>> > Hi,
>> >   I have a  distributed and replica=3 volume (not to use stripe ) in a
>> > cluster. I used dd to write 120 files to test. I foundthe write
>> performane
>> > of some files are much lower than others. all these "BAD" files are
>> stored
>> > in the same three brick servers for replication (I called node1 node2
>> node3)
>> >
>> > e.g the bad write performance could be 10MBps while good performance
>> could
>> > be 150Mbps+
>> >
>> > there are no problems about raid and networks.
>> > If i stopped node1 & node2, the write performance of "BAD" files are the
>> > similar to (even better) GOOD ones.
>> >
>> > One thing I must metion is  the raids of node1 and node2 are reformated
>> for
>> > some reason, there are many self-heal activities to restore files in
>> node1
>> > and node2.
>> > Is the BAD write performance caused by aggresive self-heal?
>> > How could I slow down the self-heal?
>> > Any advise?
>> >
>> >
>> >
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > http://supercolony.gluster.org/mailman/listinfo/gluster-users
>>
>
>
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