Storage meeting, the honourable Samuel Skipsey presiding

Discussion points:
Brian brought up the topic of the ATLAS Spacetoken simplification drive - Durham is our test case for the "simple ATLAS T3" model of only having a DATADISK token, and the move is going well. Brunel and Imperial will be the next to move.
Once this is done, timescale 4 to 8 weeks?, will be looking at the T2D/T2 spacetoken consolidation - DATA+PROD will be merged into just DATA. (Leaving just SCRATCHDISK, DATADISK and LOCALGROUPDISK as the spacetokens for ATLAS.)

Ewan reported on his initial experiences with Andey's dpm-dbck consistency tool for DPM. Generally, he was very happy with initial results having used it in --dryrun mode. 
One issue is that you can't easily toggle off subsets of its functionality (short of modifying the code).
Winnie asked about its functionality wrt non-traditional DPM sites - using HDFS backs like Bristol, for ex. We think that it is still useful for the internal db consistency - but the file checks on physical disk may not work.

Brian gave an update on the DiRAC progress. Lydia has a first draft process document, which Brian will forward to the list for comment.
We discussed the possibility of the DIRAC File Catalog / Data Management system for file movement for small VOs. There are some issues at the moment, which will probably be fixed by October (DIRAC currently makes some assumptions about endpoints).

We also discussed ATLAS "empty directory" cleanup and where to put your file catalog dump for ATLAS T2s.

Brian and Ewan will be writing up blog entries!

Chat log:

Ewan Mac Mahon: (05/08/2015 10:03)

Noooo. Not the rfio!

John Bland: (10:08 AM)

Ars3chuT

damn wrong window

too late already changed

Matt Doidge: (10:10 AM)

It could be that John is insulting us all in l33t speak.

Paige Winslowe Lacesso: (10:11 AM)

Ewan is that consistency-ck tool for dm-lite too??

Samuel Cadellin Skipsey: (10:11 AM)

dpm-dbck, Winnie

Paige Winslowe Lacesso: (10:12 AM)

IOW it assumes SRM? which dm-lite is not...

Ewan Mac Mahon: (10:13 AM)

I suspect the bits that make sense might be useful, IYSWIM, but some bits wouldn't make sense if there aren't DPM style backing stores.

But I would sort-of assume that your new dm-lite instance won't have accumulated much cruft yet, unlike our decade-plus old DPM.

Paige Winslowe Lacesso: (10:14 AM)

Sam: no dpm-dbck on our dm-lite SE.

Tx for info - will discuss w/DrKreczko. 

Ewan Mac Mahon: (10:15 AM)

If I were you I wouldn't worry about it for the time being, unless you want to do fun interesting development stuff as opposed to just using it.

Indeed, just pipe it into wc -l and see who scores the highest.

Raja Nandakumar: (10:21 AM)