On 02/02/2015 02:42 PM, Ason Hu wrote:
Hi,
In my small file test, 3 types of volume are created in
same GlusterFS Cluster (4 nodes)
- Distritubed
- Distributed Replicated
- Distributed Striped
10 million small files (8 byte) create and search each test
cycle life
Nodes info :
- OS : CentOS 6.6 64bit
- RAM : 64GB
- HDD : 4TB, 7200RPM, SAS *6 RAID 0
- FileSystem : XFS, BS=4K
Problem :
It occur when file reach ≒200
million (sum of 3 volumes)
files created speed drop from ≒1500
to ≒100
If you do this test directly on the XFS partition, what is the kind
of performance difference you see?
Pranith
Though the speed of creation become slow but search speed
and throughput still good
Seems each types of volume have same problem, I don't know
what cause this problem..
Workaround :
I try to create new volume ( Distributed |
Distributed Replicated | Distributed Striped ), mount it,
problem solved!
But the old volume write speed still sad..
I'd try to increase below volume setting, but don't work
at all
- performance.cache-size
- performance.io-thread-count
I didn't enable the volume qouta option.
Does glusterfs volume have some kind of limitation of
file creation?
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