I played with it further after I wrote that e-mail and I found out, that
this interesting thing:
dd if=/dev/zero bs=X count=10000
X troughput
1k ~3MB/s
2k ~6MB/s
4k ~12MB/s
8k ~24MB/s
16 ~48MB/s
...
128k 110MB/s
=> meaning I have tragically low IOPS (+- according to my 0.030ms
network latency).
Gluster config was one generated by "gluster" command (version 3.1.0),
but I've tried either latest 3.0.x, resulting the same.
I've tried probably all performance translators available, even AFR
instead of replicate.
Is there any way to aggregate the writes and propagate them to the
network in bigger chunks, ie. 128k?
What I don't understand is how for example NFS does this? With NFS there
is no such problem and even though IOPS are slig
On 15.11.2010 14:22, Luis E. Cerezo wrote:
have you tried larger files? I have seen a note somewhere that refers to tons
of itty bitty files, it even cites the kernel source as an example. I can't
seem to find it.
Could you try larger than 1k files?
-luis
On Nov 10, 2010, at 8:23 PM, Pavel Snajdr wrote:
Hello,
I imagine you get this kind of messages all the time, but just in case:
I have setup with 2 storage servers with debian package of gluster - version
3.1.0
They are connected by dedicated 1 gigabit ethernet cards.
I've set up simple replicated storage with 2 replicas and transport over TCP
(just followed the how to on the wiki with obvious changes).
Here goes my problem:
If I try to copy small files (i.e. extract kernel source) I get a horrible
results:
praha-storage2:/mnt/test# time tar xf linux-2.6.26.8.tar.bz2
real 15m19.825s
user 0m13.989s
sys 0m5.152s
likewise when rsyncing OpenVZ VPSes - I just can't get over 2MB/s in syncing.
I've monitored all resources - CPU load, network, disk I/O - they are all used
up to 0.00000nothing %.
Network latency is about 0.11 ms all the time.
Is this normal, or am I doing something wrong?
Please help. I am frustrated :(
--
S pozdravem / Best Regards
Pavel Šnajdr
+420 720 107 791
http://vpsfree.cz
_______________________________________________
Gluster-users mailing list
[email protected]
http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
Luis E. Cerezo
blog: http://www.luiscerezo.org
fotofun: http://www.flickr.com/photos/luiscerezo/
twitter: http://twitter.com/luiscerezo/
Voice: +1 412 223 7396
_______________________________________________
Gluster-users mailing list
[email protected]
http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
