JiscMail Logo
Email discussion lists for the UK Education and Research communities

Help for GRIDPP-STORAGE Archives


GRIDPP-STORAGE Archives

GRIDPP-STORAGE Archives


GRIDPP-STORAGE@JISCMAIL.AC.UK


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

GRIDPP-STORAGE Home

GRIDPP-STORAGE Home

GRIDPP-STORAGE  June 2006

GRIDPP-STORAGE June 2006

Options

Subscribe or Unsubscribe

Subscribe or Unsubscribe

Log In

Log In

Get Password

Get Password

Subject:

Re: dCache SFT Failures

From:

"Brew, CAJ (Chris)" <[log in to unmask]>

Reply-To:

Brew, CAJ (Chris)

Date:

Mon, 12 Jun 2006 13:20:35 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (589 lines)

Hi Owen,

We eventually tracked down the cause of the issue, it was the mount
options on the pnfsdoors mount on the gridftp door node. It wasn't
mounted with the "noac" option so was caching some of the (p)nfs info,
hence the file created a few seconds before wasn't there whent the
gridftp door looked for it - hence the (correct) error.

What we're not sure of is what's mounting the pnfsdoors area and how we
change the mount options. I've put it in /etc/fstab for now so it will
be mounted before the d-cache services start which solves the problem
but may not be the best solution.

Yours,
Chris.

 

> -----Original Message-----
> From: Owen Synge [mailto:[log in to unmask]] 
> Sent: 12 June 2006 13:11
> To: Brew, CAJ (Chris); Patrick Fuhrmann
> Cc: [log in to unmask]
> Subject: Re: dCache SFT Failures
> 
> Hello all, 
> 
> Back in Sunny Oxfordshire, I am adding Patrick to this email 
> as I think this may aid the process of finding this issue. 
> Hopefully D-Cache can fix this issue upstream.
>  
> 
> On Thu, 25 May 2006 09:59:53 +0100
> "Brew, CAJ (Chris)" <[log in to unmask]> wrote:
> 
> > Hi,
> > 
> > The details are in the dcache user-forum but it looks to me like the
> > root cause is a combination of the many VOs (and their 
> databases) and
> > having the gridftpdoor on the pool node.
> > 
> > If I move the door to the admin node the problem goes away 
> but from my
> > previous transfer tests that limits my rates to about 200 
> Mb/s rather
> > than the 400Mb/s I can get with the door on the pool node. 
> That handicap
> > will only get worse when I add another 6-8 servers and get 
> the 10GigE
> > connection to the Tier 1.
> > 
> > It looks like I've got three options:
> > 
> > Run the door on the admin node and accept slow transfers
> 
> I cant see this as a good long term solution.
> 
> > Run the door on the pool node and accept SFT failures (or 
> try to get the
> > SFTs modified to wait between the upload and access)
> 
> This seems a pragmatic work around after all these are 
> 
> "Site Functional tests" 
> 
> and provided the site is functional and this bug may be found 
> in production but is not a good indication of functionality 
> if services bugs are being caught it should be a 
> 
> "functional regression test"
> 
> in my opinion.  RAL's ADS tape system has been in production 
> for years has exactly the same issue. This issue is part of 
> the specs for an internal D-Cache bug. Of cause we cant let 
> this issue fall away if we modify the site functional tests.
> 
> > Try to reconfigure the dCache to have fewer databases (say 
> one for each
> > of the major VOs then one for every 4-6 smaller VOs). Is it even
> > possible to eliminate databases like that? But then again I 
> used to see
> > these errors occasionally even before I increased the 
> number of VOs so
> > that probably won't be a complete fix.
> 
> I think this is probably going to cause more pain and 
> suffering in the long term, until I went to DESY for the past 
> two weeks, the D-Cache team where unaware that D-Cache setups 
> contained as many as 24 VO in a typical tier 2 install. This 
> made the quota issue easier for them to understand also.
>  
> > Does anyone have any other ideas? The tier 1 doesn't seem 
> to suffer from
> > this problem despite supporting almost as many VOs and running
> > gridftpdoors on the pools? Have they split off pnfs to it's 
> own server?
> > 
> > Thanks,
> > Chris.
> 
> I know people did have ideas about decomposing the services 
> better with separate pnfs, pool and door nodes, but I 
> understand this is a timing issue, found in an unusual 
> testing use case and am unsure if we should not just escalate 
> this bug and change the tests for now.
> 
> 
> Regards
> 
> Owen
> 
> 
> > 
> > > -----Original Message-----
> > > From: Greig A Cowan [mailto:[log in to unmask]] 
> > > Sent: 24 May 2006 18:13
> > > To: Brew, CAJ (Chris)
> > > Cc: [log in to unmask]
> > > Subject: RE: dCache SFT Failures
> > > 
> > > 
> > > Hi Chris,
> > > 
> > > I've just read your post on the user-forum. That's very 
> > > interesting what you've found. Could we be seeing a scaling 
> > > problem with dCache? I hadn't realised that you were 
> > > supporting 24 VOs, each with their own database.
> > > 
> > > I'll need to look into it, but there might be an option 
> > > within pnfs that lets you control things like this.
> > > 
> > > Greig
> > > 
> > > 
> > > On Wed, 24 May 2006, Brew, CAJ (Chris) wrote:
> > > 
> > > > Hi Grieg,
> > > > 
> > > > I've just been running  some tests and have a bit more info 
> > > which I've 
> > > > just posted to the dcache user-forum it looks like the file 
> > > info isn't 
> > > > getting into the pnfs databases quickly enough.
> > > > 
> > > > That's probably why I'm failing the sfts but haven't heard 
> > > complaints 
> > > > from users.
> > > > 
> > > > I'm not sure where to take this from here unless I can tune 
> > > the DB to 
> > > > get the info in quicker.
> > > > 
> > > > Yours,
> > > > Chris.
> > > > 
> > > > > -----Original Message-----
> > > > > From: GRIDPP2: Deployment and support of SRM and 
> local storage 
> > > > > management [mailto:[log in to unmask]] On 
> > > Behalf Of Greig 
> > > > > A Cowan
> > > > > Sent: 24 May 2006 17:56
> > > > > To: [log in to unmask]
> > > > > Subject: Re: dCache SFT Failures
> > > > > 
> > > > > Hi Chris,
> > > > > 
> > > > > I see that you are still failing the SFTs, in fact, 
> the situation 
> > > > > seems worse than before!
> > > > > 
> > > > > You are definitely using the correct pnfs mount options, 
> > > aren't you? 
> > > > > Have you tried rebooting the machine?
> > > > > 
> > > > > Greig
> > > > > 
> > > > > On Tue, 23 May 2006, Brew, CAJ (Chris) wrote:
> > > > > 
> > > > > > Hi,
> > > > > > 
> > > > > > > -----Original Message-----
> > > > > > > From: GRIDPP2: Deployment and support of SRM and 
> > > local storage 
> > > > > > > management [mailto:[log in to unmask]] On
> > > > > Behalf Of Greig
> > > > > > > A Cowan
> > > > > > > Sent: 23 May 2006 12:14
> > > > > > > To: [log in to unmask]
> > > > > > > Subject: Re: dCache SFT Failures
> > > > > > > 
> > > > > > > Hi Chris,
> > > > > > > 
> > > > > > > what are the permissions of the generated directory that
> > > > > the SFT is
> > > > > > > trying to write into?
> > > > > > 
> > > > > > dteam001:dteam drwxr-xr-x
> > > > > > 
> > > > > > As all the dteam directories appear to be.
> > > > > > 
> > > > > > > What options are you using when mounting pnfs on 
> pool nodes?
> > > > > > 
> > > > > > Hmm, from /etc/mtab:
> > > > > > 
> > > > > > heplnx204.pp.rl.ac.uk:/pnfsdoors /pnfs/pp.rl.ac.uk nfs
> > > > > > rw,addr=130.246.47.204 0 0
> > > > > > heplnx204.pp.rl.ac.uk:/fs /pnfs/fs nfs
> > > > > > rw,hard,intr,noac,addr=130.246.47.204 0 0
> > > > > > 
> > > > > > I had a problem earlier where the /fs filesystem 
> hadn't mounted 
> > > > > > and the doors weren't working on the pool node, I ended 
> > > up fixing 
> > > > > > it by putting it in /etc/fstab. I've remounted it 
> with the same
> > > > > options as
> > > > > > the
> > > > > > pnfsdoors:
> > > > > > 
> > > > > > heplnx204.pp.rl.ac.uk:/pnfsdoors /pnfs/pp.rl.ac.uk nfs
> > > > > > rw,addr=130.246.47.204 0 0
> > > > > > heplnx204.pp.rl.ac.uk:/fs /pnfs/fs nfs 
> > > rw,addr=130.246.47.204 0 0
> > > > > > 
> > > > > > Are the dCache filesystems in your fstab? what are 
> the options?
> > > > > > 
> > > > > > Thanks,
> > > > > > Chris.
> > > > > > 
> > > > > > > Cheers,
> > > > > > > Greig
> > > > > > > 
> > > > > > > On Tue, 23 May 2006, Brew, CAJ (Chris) wrote:
> > > > > > > 
> > > > > > > > Hi,
> > > > > > > > 
> > > > > > > > Removing the cron job doesn't seem to have solved the
> > > > > problem, the
> > > > > > > > load on the machine is pretty low. Any other things I
> > > > > can try, My
> > > > > > > > reliability is really low at the moment because of this.
> > > > > > > > 
> > > > > > > > Thanks,
> > > > > > > > Chris
> > > > > > > > 
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: Greig A Cowan [mailto:[log in to unmask]]
> > > > > > > > > Sent: 22 May 2006 12:33
> > > > > > > > > To: Brew, CAJ (Chris)
> > > > > > > > > Cc: [log in to unmask]
> > > > > > > > > Subject: RE: dCache SFT Failures
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > > Hmmm, yes there's a houly cron (on the hour so it's
> > > > > > > probably still
> > > > > > > > > > running if the SFT gets through the queue 
> quickly) that
> > > > > > > du's the
> > > > > > > > > > dCache area to get a per VO breakdown of usage. 
> > > > > I'll disable
> > > > > > > > > > it and see if the SFT pass rate improves.
> > > > > > > > > 
> > > > > > > > > You could run the cron at half past the hour 
> instead. Do
> > > > > > > you really
> > > > > > > > > need to run the cron every hour? The Tier-1 just run
> > > > > a similar
> > > > > > > > > command each night at 12pm.
> > > > > > > > > 
> > > > > > > > > > p.s. Anyone know of another way of getting the 
> > > information
> > > > > > > > > (A query on
> > > > > > > > > > the DB perhaps)?
> > > > > > > > > 
> > > > > > > > > Unfortunately not. I asked about this, but it's 
> > > not possible 
> > > > > > > > > with dCache at the moment. It should be 
> available in a 
> > > > > > > > > future
> > > > > > > release...
> > > > > > > > > 
> > > > > > > > > > 
> > > > > > > > > > > -----Original Message-----
> > > > > > > > > > > From: GRIDPP2: Deployment and support of SRM and
> > > > > > > local storage
> > > > > > > > > > > management 
> [mailto:[log in to unmask]] On
> > > > > > > > > Behalf Of Greig
> > > > > > > > > > > A Cowan
> > > > > > > > > > > Sent: 22 May 2006 12:15
> > > > > > > > > > > To: [log in to unmask]
> > > > > > > > > > > Subject: Re: dCache SFT Failures
> > > > > > > > > > > 
> > > > > > > > > > > Hi Chris,
> > > > > > > > > > > 
> > > > > > > > > > > I've seen this before, but it's unclear to me
> > > > > what causes it. 
> > > > > > > > > > > Looking at your latest SFT failure 
> (10:10), the lcg-cp
> > > > > > > > > command was
> > > > > > > > > > > successful, but the subsequent lcg-rep failed.
> > > > > > > > > > > 
> > > > > > > > > > > Is there something else running on your 
> dCache node 
> > > > > > > > > > > which
> > > > > > > > > could be
> > > > > > > > > > > interfering with pnfs? Maybe a cron job 
> of some sort?
> > > > > > > > > > > 
> > > > > > > > > > > Cheers,
> > > > > > > > > > > Greig
> > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > > > On Mon, 22 May 2006, Brew, CAJ (Chris) wrote:
> > > > > > > > > > > 
> > > > > > > > > > > > Hi All,
> > > > > > > > > > > > 
> > > > > > > > > > > > I'm getting a lot of random failures in the 
> > > SFTs from 
> > > > > > > > > > > > my
> > > > > > > > > > > dCache where
> > > > > > > > > > > > the write of the file to the dCache appears
> > > > > successful but
> > > > > > > > > > > then when
> > > > > > > > > > > > the SFT tries to read the file back you get:
> > > > > > > > > > > > 
> > > > > > > > > > > > + lcg-cp -v --vo dteam
> > > > > > > > > > > > + 
> lfn:sft-lcg-rm-cr-heplnx48.pp.rl.ac.uk.0605220722
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> file:///scratch/WMS_heplnx48_018249_https_3a_2f_2fgdrb02.cern.ch_3a9
> > > > > > > > > > > 00
> > > > > > > > > > > > 0_ 2fLxXmsliu9ehFjCWOYEcxQg/sft-lcg-rm-cp.txt
> > > > > > > > > > > > the server sent an error response: 553 553 
> > > Permission
> > > > > > > > > > > denied, reason:
> > > > > > > > > > > > CacheException(rc=666;msg=can't get 
> pnfsId (not a
> > > > > > > > > > > > pnfsfile))
> > > > > > > > > > > > 
> > > > > > > > > > > > lcg_cp: Permission denied Using grid 
> > > catalog type: lfc 
> > > > > > > > > > > > Using grid catalog :
> > > > > > > > > > > > prod-lfc-shared-central.cern.ch
> > > > > > > > > > > > 
> > > > > > > > > > > > It appears that the write was indeed successful 
> > > > > > > > > > > > because the
> > > > > > > > > > > same SFT
> > > > > > > > > > > > can later replicate it to CERN:
> > > > > > > > > > > > 
> > > > > > > > > > > > Replicate the file from the default SE to 
> > > > > > > > > > > > castorgrid.cern.ch
> > > > > > > > > > > > 
> > > > > > > > > > > > + lcg-rep -v --vo dteam -d castorgrid.cern.ch
> > > > > > > > > > > > 
> lfn:sft-lcg-rm-cr-heplnx48.pp.rl.ac.uk.0605220722
> > > > > > > > > > > > 
> > > > > > > > > > > >             0 bytes      0.00 KB/sec 
> avg      0.00 
> > > > > > > KB/sec inst
> > > > > > > > > > > >             0 bytes      0.00 KB/sec 
> avg      0.00 
> > > > > > > KB/sec inst
> > > > > > > > > > > >             0 bytes      0.00 KB/sec avg      
> > > > > 0.00 KB/sec
> > > > > > > > > > > instUsing grid
> > > > > > > > > > > > catalog type: lfc
> > > > > > > > > > > > Using grid catalog : 
> > > > > > > prod-lfc-shared-central.cern.ch Source URL:
> > > > > > > > > > > > 
> > > > > > > > > 
> > > > > 
> lfn:/grid/dteam/SFT/sft-lcg-rm-cr-heplnx48.pp.rl.ac.uk.060522072
> > > > > > > > > 2
> > > > > > > > > > > > File size: 233
> > > > > > > > > > > > VO name: dteam
> > > > > > > > > > > > Destination specified: castorgrid.cern.ch Source
> > > > > > > URL for copy:
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> gsiftp://heplnx204.pp.rl.ac.uk:2811//pnfs/pp.rl.ac.uk/data/dteam/gen
> > > > > > > > > > > er
> > > > > > > > > > > > at
> > > > > > > > > > > > 
> > > ed/2006-05-22/file330985b9-5368-4e67-82ec-5ee6f6fd4fa8
> > > > > > > > > > > > Destination URL for copy:
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> gsiftp://castorgrid.cern.ch/castor/cern.ch/grid/dteam/generated/2006
> > > > > > > > > > > -0
> > > > > > > > > > > > 5- 22/file8c15f735-de68-4949-aba5-33c9098462ff
> > > > > > > > > > > > # streams: 1
> > > > > > > > > > > > # set timeout to 0
> > > > > > > > > > > > 
> > > > > > > > > > > > Transfer took 2020 ms
> > > > > > > > > > > > Destination URL registered in LRC:
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> sfn://castorgrid.cern.ch/castor/cern.ch/grid/dteam/generated/2006-05
> > > > > > > > > > > -2
> > > > > > > > > > > > 2/ file8c15f735-de68-4949-aba5-33c9098462ff
> > > > > > > > > > > > + result=0
> > > > > > > > > > > > + set +x
> > > > > > > > > > > > 
> > > > > > > > > > > > List replicas to check if replication 
> was really 
> > > > > > > > > > > > successful
> > > > > > > > > > > > 
> > > > > > > > > > > > + lcg-lr --vo dteam
> > > > > > > > > > > lfn:sft-lcg-rm-cr-heplnx48.pp.rl.ac.uk.0605220722
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> sfn://castorgrid.cern.ch/castor/cern.ch/grid/dteam/generated/2006-05
> > > > > > > > > > > -2
> > > > > > > > > > > > 2/ file8c15f735-de68-4949-aba5-33c9098462ff
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> srm://heplnx204.pp.rl.ac.uk/pnfs/pp.rl.ac.uk/data/dteam/generated/20
> > > > > > > > > > > 06
> > > > > > > > > > > > -0
> > > > > > > > > > > > 5-22/file330985b9-5368-4e67-82ec-5ee6f6fd4fa8
> > > > > > > > > > > > + set +x
> > > > > > > > > > > > 
> > > > > > > > > > > > I was always getting a few of these but 
> > > since I added 
> > > > > > > > > > > > extra
> > > > > > > > > > > VOs a week
> > > > > > > > > > > > ago I now seem to failing between 30 
> and 50% of the 
> > > > > > > > > > > > SFT
> > > > > > > > > > > runs with this
> > > > > > > > > > > > alone.
> > > > > > > > > > > > 
> > > > > > > > > > > > I haven't managed to replicate the error by
> > > > > copying files
> > > > > > > > > > > in and out
> > > > > > > > > > > > multiple times and the SFT deletes the 
> file so I 
> > > > > > > > > > > > cannot
> > > > > > > > > check the
> > > > > > > > > > > > status of the file the see the error with.
> > > > > > > > > > > > 
> > > > > > > > > > > > Googling for the error seems to show 
> that it's not
> > > > > > > > > uncommon but I
> > > > > > > > > > > > don't see and indications of cause or 
> > > solution. There
> > > > > > > > > > > doesn't seem to
> > > > > > > > > > > > be anything in the logs.
> > > > > > > > > > > > 
> > > > > > > > > > > > Anyone know what I can do about this (other than
> > > > > > > install DPM)?
> > > > > > > > > > > > 
> > > > > > > > > > > > Thanks,
> > > > > > > > > > > > Chris.
> > > > > > > > > > > > 
> > > > > > > > > > > > Examples taken from:
> > > > > > > > > > > > 
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > 
> > > > > > > 
> > > > > 
> > > 
> https://lcg-sft.cern.ch/sft/info/heplnx201.pp.rl.ac.uk/sft_2006-05-2
> > > > > > > > > > > 2_
> > > > > > > > > > > > 07
> > > > > > > > > > > > .10.05.html#sft-lcg-rm_2006-05-22_07:22:49
> > > > > > > > > > > > 
> > > > > > > > > > > 
> > > > > > > > > > > --
> > > > > > > > > > > 
> > > > > ============================================================
> > > > > > > > > > > ==
> > > > > > > > > > > ==========
> > > > > > > > > > > Dr Greig A Cowan                         
> > > > > > > > > > > http://www.ph.ed.ac.uk/~gcowan1 School of 
> Physics, 
> > > > > > > > > > > University of Edinburgh, James
> > > > > > > Clerk Maxwell
> > > > > > > > > > > Building
> > > > > > > > > > > 
> > > > > > > > > > > TIER-2 STORAGE SUPPORT PAGES: 
> > > > > > > > > > > http://wiki.gridpp.ac.uk/wiki/Grid_Storage
> > > > > > > > > > > 
> > > > > ============================================================
> > > > > > > > > > > ==
> > > > > > > > > > > ==========
> > > > > > > > > > > 
> > > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > --
> > > > > > > > > 
> > > ============================================================
> > > > > > > > > ==
> > > > > > > > > ==========
> > > > > > > > > Dr Greig A Cowan                         
> > > > > > > > > http://www.ph.ed.ac.uk/~gcowan1 School of Physics, 
> > > > > > > > > University of Edinburgh, James
> > > > > Clerk Maxwell
> > > > > > > > > Building
> > > > > > > > > 
> > > > > > > > > TIER-2 STORAGE SUPPORT PAGES: 
> > > > > > > > > http://wiki.gridpp.ac.uk/wiki/Grid_Storage
> > > > > > > > > 
> > > ============================================================
> > > > > > > > > ==
> > > > > > > > > ==========
> > > > > > > > > 
> > > > > > > > 
> > > > > > > 
> > > > > > > --
> > > > > > > 
> ==============================================================
> > > > > > > ==========
> > > > > > > Dr Greig A Cowan                         
> > > > > > > http://www.ph.ed.ac.uk/~gcowan1
> > > > > > > School of Physics, University of Edinburgh, James 
> > > Clerk Maxwell 
> > > > > > > Building
> > > > > > > 
> > > > > > > TIER-2 STORAGE SUPPORT PAGES: 
> > > > > > > http://wiki.gridpp.ac.uk/wiki/Grid_Storage
> > > > > > > 
> ==============================================================
> > > > > > > ==========
> > > > > > > 
> > > > > > 
> > > > > 
> > > > > --
> > > > > ==============================================================
> > > > > ==========
> > > > > Dr Greig A Cowan                         
> > > > > http://www.ph.ed.ac.uk/~gcowan1
> > > > > School of Physics, University of Edinburgh, James 
> Clerk Maxwell 
> > > > > Building
> > > > > 
> > > > > TIER-2 STORAGE SUPPORT PAGES: 
> > > > > http://wiki.gridpp.ac.uk/wiki/Grid_Storage
> > > > > ==============================================================
> > > > > ==========
> > > > > 
> > > > 
> > > 
> > > --
> > > ==============================================================
> > > ==========
> > > Dr Greig A Cowan                         
> > > http://www.ph.ed.ac.uk/~gcowan1
> > > School of Physics, University of Edinburgh, James Clerk 
> > > Maxwell Building
> > > 
> > > TIER-2 STORAGE SUPPORT PAGES: 
> > > http://wiki.gridpp.ac.uk/wiki/Grid_Storage
> > > ==============================================================
> > > ==========
> > > 
> 

Top of Message | Previous Page | Permalink

JiscMail Tools


RSS Feeds and Sharing


Advanced Options


Archives

March 2024
February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
November 2022
October 2022
September 2022
August 2022
July 2022
June 2022
May 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
October 2004
September 2004
August 2004
July 2004
June 2004


JiscMail is a Jisc service.

View our service policies at https://www.jiscmail.ac.uk/policyandsecurity/ and Jisc's privacy policy at https://www.jisc.ac.uk/website/privacy-notice

For help and support help@jisc.ac.uk

Secured by F-Secure Anti-Virus CataList Email List Search Powered by the LISTSERV Email List Manager