URL:
<http://savannah.cern.ch/support/?132506>
Summary: Setting up a machine for xrootd data caching
Project: XROOTD
Submitted by: boccali
Submitted on: 2012-09-28 09:00
Category: None
Priority: 5 - Normal
Severity: 3 - Normal
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Operating System: GNU/Linux
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Details:
Hi,
I am trying to set-up a machine for high load analysis tasks.
The idea is to
- have a large disk attached (72 TB Sun Thor machine)
- use it as an XROOTD cache
The preferred way of operation would be
- pre-allocate nothing on the cache
- everytime the machine is asked for a file, it is moved on the cache (I
understand with something like
mps.xfrcmd /usr/bin/xrdcp %sfn %tfn
mps.mssdir root://MY-EXPERIMENT-GLOBAL-REDIRECTOR/
)
- from the second attempt, the file is found locally.
I was not able to have the configuration running, starting from a simple
local only machine + just adding those two lines. Can you point me to an
example config?
And then (2nd priority), how is the cache handled (for example, cleaning
etc)?
thanks a lot
tommaso
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