Begin forwarded message:

From: Harut Avakian <[log in to unmask]>

Subject: [Clas_offline] Fwd: ENP consumption of disk space under /work

Date: June 1, 2017 at 5:01:24 PM GMT+2

To: "[log in to unmask]" <[log in to unmask]>

Dear All,

As you can see from the e-mail below,  keeping all our work disk space requires some additional funding.

Option 3 will inevitably impact on farm operations, removing of ~20% space from Lustre.

We can also choose something between options 1) and 3).

Please revise the content and move at least 75% of what is in /work/clas  to either /cache or /volatile? 

The current Hall-B usage includes:

550G    hallb/bonus
1.5T    hallb/clase1
3.6T    hallb/clase1-6
3.3T    hallb/clase1dvcs
2.8T    hallb/clase1dvcs2
987G    hallb/clase1f
1.8T    hallb/clase2
1.6G    hallb/clase5
413G    hallb/clase6
2.2T    hallb/claseg1
3.9T    hallb/claseg1dvcs
1.2T    hallb/claseg3
4.1T    hallb/claseg4
2.7T    hallb/claseg5
1.7T    hallb/claseg6
367G    hallb/clas-farm-output
734G    hallb/clasg10
601G    hallb/clasg11
8.1T    hallb/clasg12
2.4T    hallb/clasg13
2.4T    hallb/clasg14
28G    hallb/clasg3
5.8G    hallb/clasg7
269G    hallb/clasg8
1.2T    hallb/clasg9
1.3T    hallb/clashps
1.8T    hallb/clas-production
5.6T    hallb/clas-production2
1.4T    hallb/clas-production3
12T    hallb/hps
13T    hallb/prad

Regards,

Harut

P.S. Few times we had crashes and they may also happen in future, so keeping important files in /work is not recommended.
You can see the list of lost files in /site/scicomp/lostfiles.txt  and  /site/scicomp/lostfiles-jan-2017.txt



-------- Forwarded Message --------

Subject:	ENP consumption of disk space under /work
Date:	Wed, 31 May 2017 10:35:51 -0400
From:	Chip Watson <[log in to unmask]>
To:	Sandy Philpott <[log in to unmask]>, Graham Heyes <[log in to unmask]>, Ole Hansen <[log in to unmask]>, Harut Avakian <[log in to unmask]>, Brad Sawatzky <[log in to unmask]>, Mark M. Ito <[log in to unmask]>

All,

As I have started on the procurement of the new /work file server, I 
have discovered that Physics' use of /work has grown unrestrained over 
the last year or two.

"Unrestrained" because there is no way under Lustre to restrain it 
except via a very unfriendly Lustre quota system.  As we leave some 
quota headroom to accommodate large swings in usage for each hall for 
cache and volatile, then /work continues to grow.

Total /work has now reached 260 TB, several times larger than I was 
anticipating.  This constitutes more than 25% of Physics' share of 
Lustre, compared to LQCD which uses less than 5% of its disk space on 
the un-managed /work.

It would cost Physics an extra $25K (total $35K - $40K) to treat the 260 
TB as a requirement.

There are 3 paths forward:

(1) Physics cuts its use of /work by a factor of 4-5.
(2) Physics increases funding to $40K
(3) We pull a server out of Lustre, decreasing Physics' share of the 
system, and use that as half of the new active-active pair, beefing it 
up with SSDs and perhaps additional memory; this would actually shrink 
Physics near term costs, but puts higher pressure on the file system for 
the farm

The decision is clearly Physics', but I do need a VERY FAST response to 
this question, as I need to move quickly now for LQCD's needs.

Hall D + GlueX,  96 TB
CLAS + CLAS12, 98 TB
Hall C,                35 TB
Hall A <unknown, still scanning>

Email, call (x7101), or drop by today 1:30-3:00 p.m. for discussion.

thanks,
Chip

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