[gpfsug-discuss] NSD access routes

Dave Goodbourn dave at milk-vfx.com
Mon Jun 5 15:00:45 BST 2017


OK I'm going to hang my head in the corner...RTFM...I've not filled the
memory buffer pool yet so I doubt it will have anything in it yet!! :(

----------------------------------------------------
*Dave Goodbourn*
Head of Systems
*MILK <http://www.milk-vfx.com/> VISUAL EFFECTS*

5th floor, Threeways House,
40-44 Clipstone Street London, W1W 5DW
Tel: *+44 (0)20 3697 8448*
Mob: *+44 (0)7917 411 069*

On 5 June 2017 at 14:55, Dave Goodbourn <dave at milk-vfx.com> wrote:

> OK slightly ignore that last email. It's still not updating the output but
> I realise the Stats from line is when they started so probably won't
> update! :(
>
> Still nothing seems to being cached though.
>
> ----------------------------------------------------
> *Dave Goodbourn*
> Head of Systems
> *MILK <http://www.milk-vfx.com/> VISUAL EFFECTS*
>
> 5th floor, Threeways House,
> 40-44 Clipstone Street London, W1W 5DW
> Tel: *+44 (0)20 3697 8448*
> Mob: *+44 (0)7917 411 069*
>
> On 5 June 2017 at 14:49, Dave Goodbourn <dave at milk-vfx.com> wrote:
>
>> Thanks Bob,
>>
>> That pagepool comment has just answered my next question!
>>
>> But it doesn't seem to be working. Here's my mmdiag output:
>>
>> === mmdiag: lroc ===
>> LROC Device(s): '0AF0000259355BA8#/dev/sdb;0AF
>> 0000259355BA9#/dev/sdc;0AF0000259355BAA#/dev/sdd;' status Running
>> Cache inodes 1 dirs 1 data 1  Config: maxFile 0 stubFile 0
>> Max capacity: 1151997 MB, currently in use: 0 MB
>> Statistics from: Mon Jun  5 13:40:50 2017
>>
>> Total objects stored 0 (0 MB) recalled 0 (0 MB)
>>       objects failed to store 0 failed to recall 0 failed to inval 0
>>       objects queried 0 (0 MB) not found 0 = 0.00 %
>>       objects invalidated 0 (0 MB)
>>
>>       Inode objects stored 0 (0 MB) recalled 0 (0 MB) = 0.00 %
>>       Inode objects queried 0 (0 MB) = 0.00 % invalidated 0 (0 MB)
>>       Inode objects failed to store 0 failed to recall 0 failed to query
>> 0 failed to inval 0
>>
>>       Directory objects stored 0 (0 MB) recalled 0 (0 MB) = 0.00 %
>>       Directory objects queried 0 (0 MB) = 0.00 % invalidated 0 (0 MB)
>>       Directory objects failed to store 0 failed to recall 0 failed to
>> query 0 failed to inval 0
>>
>>       Data objects stored 0 (0 MB) recalled 0 (0 MB) = 0.00 %
>>       Data objects queried 0 (0 MB) = 0.00 % invalidated 0 (0 MB)
>>       Data objects failed to store 0 failed to recall 0 failed to query 0
>> failed to inval 0
>>
>>   agent inserts=0, reads=0
>>         response times (usec):
>>         insert min/max/avg=0/0/0
>>         read   min/max/avg=0/0/0
>>
>>   ssd   writeIOs=0, writePages=0
>>         readIOs=0, readPages=0
>>         response times (usec):
>>         write  min/max/avg=0/0/0
>>         read   min/max/avg=0/0/0
>>
>>
>> I've restarted GPFS on that node just in case but that didn't seem to
>> help. I have LROC on a node that DOESN'T have direct access to an NSD so
>> will hopefully cache files that get requested over NFS.
>>
>> How often are these stats updated? The Statistics line doesn't seem to
>> update when running the command again.
>>
>> Dave,
>> ----------------------------------------------------
>> *Dave Goodbourn*
>> Head of Systems
>> *MILK <http://www.milk-vfx.com/> VISUAL EFFECTS*
>>
>> 5th floor, Threeways House,
>> 40-44 Clipstone Street London, W1W 5DW
>> Tel: *+44 (0)20 3697 8448*
>> Mob: *+44 (0)7917 411 069*
>>
>> On 5 June 2017 at 13:48, Oesterlin, Robert <Robert.Oesterlin at nuance.com>
>> wrote:
>>
>>> Hi Dave
>>>
>>>
>>>
>>> I’ve done a large-scale (600 node) LROC deployment here - feel free to
>>> reach out if you have questions.
>>>
>>>
>>>
>>> mmdiag --lroc is about all there is but it does give you a pretty good
>>> idea how the cache is performing but you can’t tell which files are cached.
>>> Also, watch out that the LROC cached will steal pagepool memory (1% of the
>>> LROC cache size)
>>>
>>>
>>>
>>> Bob Oesterlin
>>> Sr Principal Storage Engineer, Nuance
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From: *<gpfsug-discuss-bounces at spectrumscale.org> on behalf of Dave
>>> Goodbourn <dave at milk-vfx.com>
>>> *Reply-To: *gpfsug main discussion list <gpfsug-discuss at spectrumscale.
>>> org>
>>> *Date: *Monday, June 5, 2017 at 7:19 AM
>>> *To: *gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
>>> *Subject: *[EXTERNAL] Re: [gpfsug-discuss] NSD access routes
>>>
>>>
>>>
>>> I'm testing out the LROC idea. All seems to be working well, but, is
>>> there anyway to monitor what's cached? How full it might be? The
>>> performance etc??
>>>
>>>
>>>
>>> I can see some stats in mmfsadm dump lroc but that's about it.
>>>
>>>
>>>
>>>
>>
>
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