Re: [Lustre-discuss] Extremely high load and hanging processes on a Lustre client

[Götz Waschk]

2010/3/6 Bernd Schubert bs_li...@aakef.fastmail.fm:
 Do you have any idea what to test before rebooting the machine?
 Don't reboot, but disable LRU resizing.
 for i in /proc/fs/lustre/ldlm/namespaces/*; do echo 800  ${i}/lru_size; done
 At least that helped all the time before when we had that problem. I hoped it
 would be fixed in 1.8.2, but seems it is not. Please open a bug report.
Hi Bernd,

thanks for your help, it worked. I have opened a bug here:

https://bugzilla.lustre.org/show_bug.cgi?id=22276

Regards, Götz Waschk
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[Lustre-discuss] Write optimizations on OSS

[Arifa Nisar]

Hi,

 

I have been running some write only benchmarks on Lustre with following two
versions at two different machines. 

lustre: 1.6.6

build:
1.6.6-1969123118-PRISTINE-.usr.src.linux-2.6.18-92.1.10.el5_lustre.1.6.6
smp-perfctr

Configuration: 1 OSS for 11 OST.

 

 

lustre: 1.6.5

build:  1.6.5-2.1.50HDB_PS13A-rsrel-REL_2_1_50-19575-2009-11-13-18:58

Configuration: 1 OSS for 2 OST

 

I have noticed that if contiguous data is written to the OSTs under one OSS
then some performance benefit is achieved. Is there any caching, aggregation
or other optimization implemented in OSS for write accesses? I understand
that there is read caching but I could not get much information about write
optimization on OSS.

 

Thanks,

Arifa.

 

 

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Re: [Lustre-discuss] How builds will be numbered in future Lustre releases

[Christopher J. Morrone]

melanie gao wrote:

 Yes, we're updating lustre-version.ac - you can follow the progress 
 under bug #22234.
 I think we should be able to accommodate your request to add the 
 additional field you mentioned.  Could I ask you to file a bug for this 
 and cc: me?

Done.  For everyone's reference I filed this is in bug 22281.
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