Last modified 11 years ago Last modified on 10/27/09 16:53:36

dCache Tier I meeting October 27, 2009

[part of a series of meetings]

Present, Irina, Owen, Jan, Tanya, Paul), IN2P3(), Sara(), Triumf(), BNL(Pedro), NDGF(Gerd), PIC(Gerard), GridKa(Silke, Doris), Fermi(), CERN()


(see box on the other side)

Site reports


Quite for a while now.

Moved most of the head nodes to new hardware. The dCacheDomain node is still on the old hardware (due to DNS issues with the pools).

Gerd mentioned on

PostGreSQL 8.4 dCache v1.9.5-5 upgrade

Tomorrow afternoon switching to new info provider.

Things looking.

Choice between

newer kernel to older

Hardware is sufficiently new that we would need to

NFS access for dCache? No, not for the WNs.

Use Chimera as name-space.

Gerard: we wish to switch to Chimera asap. We have some small VOs.


Update today ATLAS to 1.9.5-4 update was fine; it's

Suffering massively from the root directory problem. Work-around is in place, but more than half of the directories created are root-owned. Gerd: The 1.9.5-5 released today contains some work-around

Only need to update the PnfsManager to get the benefit.

Don't believe we can migrate ATLAS from PNFS to Chimera before LHC start.

info system was a bit unstable earlier on.

Not sure if it was a dCache problem or something else.

New XML format was more complex. Tried to use the old XML file to begin with. Some more information was published but other was not.

CMS 1.9.4-2 Next week old dCache 1.9.1, Wednesday CMS 1.9.5-latest


There were a

File size in level -2, fixed in 1.9.5-5 in PnfsManager node. Issue with PhedEx.

Can we upgrade only machine with PnfsManager to 1.9.5-5? Yes.

New info provider: found something publish several SRM end-point.

The reason to publish

Multiple SRMs on your system.

We tried this once but had issues with GridFTP.

Need to have only one SrmSpaceManager in the whole dCache system.

With 1.9.6, this becomes easier because it is easier to move cells about.



Testing of NFS. It's not totally straight-forward to test at the moment: you need a new kernel and new NFS client tools.

Gerard: we hope that, by the time enstore supports Chimera, there will be kernels and user-land tools to support NFS v4.1

Tigran believes that OpenSolaris? Build 125 doesn't support NFS v4.1.


Proposed: same time, next week.