wiki:tier-one-meeting-20171128
Last modified 12 months ago Last modified on 11/28/17 15:21:08

dCache Tier I meeting MONTH DATE, 2013

[part of a series of meetings]

Present

dCache.org(Tigran, Paul), IN2P3(), Sara(), Triumf(), BNL(), NDGF(Ulf), PIC(Elina), KIT(Xavier), Fermi(), CERN()

Agenda

(see box on the other side)

Site reports

PIC

Having efficiency problems with ATLAS. Some transfers transfers (FTP) with 0 bytes transfers.

Query 'movers ls' with zero bytes transferred.

Do you see the client-IP address in the mover ls output. Is the client always the same or different?

SRM request -- redirects the transfer to the GridFTP door, then to the pool.

NDGF

ATLAS decided to switch all transfers GridFTP to xrootd, yielding 1/20th of the performance.

This was with the arc-xrootd client.

The PostgreSQL reverted configuration so that it required passwords from dCache, which wasn't configured.

The latest dCache version -- the 'dcache' command should be split up between

Deploying pools as tar-balls.

KIT

Busy restarting all our dCache services -- replaced a ZK server. Combine this update with the latest dCache 2.16 (2.16.64) and switch from cells to core and

Ulf reported that NDGF had similar problems, which Gerd worked on. They now run dCache 3.0 without any problems. Restarting ZK node then internal connections went bad

Problem with which port clients connect

RT ticket #9307. Not possible currently, but we need to add an option to support this.

Can update ZK directly without dCache support. The value will be overwritten when dCache core domain next restarts.

Tigran to update ticket with information how to do this.

Problem with dcap client

RT ticket 9306

At DESY, dnf / yum shows dcap v2.47.11, which is the broken version.

There is a fixed version (v2.47.12), which is currently in EPEL testing.

Update

Updates .. on LHCb instance Xavier has disabled seq scan and removed the curl timeout option and adjusted the PnfsManager slow timeout to be 500 ms. There have been only 5 PnfsManager operations taking more than 500 ms and no WebDAV transfers have failed.

srmmanager 4 get file attributes, create upload path.

Closing RT tickets

RT ticket 9282

Create an account for the KIT mailing list.

Support tickets for discussion

[Items are added here automagically]

DTNM

Same time, next week.