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Hi all, The problem was timing, now the script deletes the file from the cache and my monitoring system is able to request the file. Using the G-stream from the cache I can check other details about these tests. @Robbert, this is very interesting! Are these hacks on GitHub or similar? *--Fábio Andrijauskas* On Wed, Apr 13, 2022 at 3:32 AM CURRIE Robert <[log in to unmask]> wrote: > Hi, > > I had understood that the point of the XrdPfcCommand was to allow for a > certain file to be removed from the cache with a call to the service for > testing. > > https://github.com/xrootd/xrootd/blob/6b0209fd262f9f571e93daef17df1724dac8eed5/src/XrdPfc/XrdPfcCommand.cc#L268 > > I don't know if this is this still supported as I haven't tested it (yet). > I've just removed the files from disk and haven't had the server react > badly from me doing so, it just looks for the file, finds it missing and > re-acquires it. > > @Fabio Andrijauskas <[log in to unmask]> I've been looking into > modifying/expanding the Pfc recently at Edinburgh. > (nothing other than ugly local hacks on a test instance for now). > I think we're mainly interested from a cache performance improvement > angle, and possibly building a set of cache/purge decision libraries which > we can configure, but I've also been looking at the monitoring data with > some interest to compare it to our .cinfo file monitor. > > > Best Regards, > > Rob > > ------------------------------ > *From:* [log in to unmask] <[log in to unmask]> on behalf > of Andrew Hanushevsky < > [log in to unmask]> > *Sent:* 13 April 2022 01:08 > *To:* Fabio Andrijauskas <[log in to unmask]> > *Cc:* [log in to unmask] <[log in to unmask]> > *Subject:* Re: Delete a file from rooted cache > > This email was sent to you by someone outside the University. > You should only click on links or attachments if you are certain that the > email is genuine and the content is safe. > > Hi Fabio, > > There is no way to flush (effectively delete) a file from the cache. We > have talked about providing such a feature but didn't have a use case for > it. Anyway, I assume you are logging into the Xcache server and physically > removing the files. As long as you do that when no one is using the file a > subsequent xrdcp should not hang. So, I suspect the timing was a bit off > or I don't understand the actual steps you were taking. > > Andy > > > On Tue, 12 Apr 2022, Fabio Andrijauskas wrote: > > > Hi Folks, > > > > I am improving the Xrootd cache monitoring on OSG, and I would like to > > check if the cache can provide a cached file and if the cache can fetch a > > file from the origin. To check the origin cache process, I want to > delete a > > specific file on the cache and request this file on the client, in that > way > > forcing the cache to fetch the origin file. > > > > I am deleting 4 files, two links, and two files related to this > > cached file. However, when I do that, the xrdcopy process hangs and > > timeout. So, I need to restart the cache to back to the regular > operation. > > > > What is the right way to force the cache to fetch a file on the origin? > > > > > > > > *--Fábio Andrijauskas* > > > > ######################################################################## > > Use REPLY-ALL to reply to list > > > > To unsubscribe from the XROOTD-L list, click the following link: > > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 > > > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the XROOTD-L list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 > The University of Edinburgh is a charitable body, registered in Scotland, > with registration number SC005336. Is e buidheann carthannais a th’ ann an > Oilthigh Dhùn Èideann, clàraichte an Alba, àireamh clàraidh SC005336. > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1