[Gluster-users] gluster write performance

[Mathieu Chateau]

These numbers are not helpfull without context :

   - Raid level
   - Number of disks
   - nature & size of files

What do you get for this sample?
dd if=/dev/zero of=sample.txt bs=50M count=1

Test it accross differents cases to get a baseline:

   - Local disk on client
   - Locak disk on each brick
   - through gluster from client

Once you have your baseline, you can start to tune system and see changes
based on it.


Cordialement,
Mathieu CHATEAU
http://www.lotp.fr

2015-07-18 22:11 GMT+02:00 Roman <romeo.r at gmail.com>:

> But when I'm inside of VM, I'm getting 50-53 MB/s for replica and 120 MB
> for distributed volumes...
> whats the logic? that slow write speed directly to mounted gfs volume
> slows down backup and restore process of VMs by VE.
>
> 2015-07-18 22:47 GMT+03:00 Roman <romeo.r at gmail.com>:
>
>> Hi,
>>
>> Looked a lot from forums, but didn't find much..
>> So I've got glusterfs 3.6.4
>> 1 Gbps network
>> replicate and distributed volumes
>>
>> so when i read from any of them, I get maxed-out network performance
>> (around 80-120 MB/sec)
>> If i write to distributed volume, I get 16 MB/sec
>> If i write to replicated volume, I get around half of it (which is
>> logical) 8-10MB/sec
>>
>> i use XFS (with all set recommended options) and EXT4 for gluster. no
>> difference.
>> Disks are in HW RAID5 for Distributed volume and RAID0 for Replicated
>> volume
>>
>> volume options:
>>
>> performance.write-behind: off
>> server.allow-insecure: on
>> cluster.server-quorum-type: server
>> cluster.quorum-type: auto
>> network.remote-dio: enable
>> cluster.eager-lock: enable
>> performance.stat-prefetch: off
>> performance.io-cache: off
>> performance.read-ahead: off
>> performance.quick-read: off
>>
>> Am I missing something?
>>
>> --
>> Best regards,
>> Roman.
>>
>
>
>
> --
> Best regards,
> Roman.
>
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