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GRIDPP-STORAGE  May 2005

GRIDPP-STORAGE May 2005

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Subject:

Re: dcache installation

From:

Owen Synge <[log in to unmask]>

Reply-To:

Owen Synge <[log in to unmask]>

Date:

Wed, 25 May 2005 11:43:05 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (84 lines)

I just got this email so I thought I should forward the relevant parts

all information about LCG/IA64 is available here:

http://openlab-mu-internal.web.cern.ch/openlab-mu-internal/Projects/LCGonIA64/LCGonIA64.asp

Besides of that an IA64/LCG-2_4_0 WN, CE & SECLASSIC are in the LCG certification testbed and are being tested every day. So far they did not see any problems on SL3.

Regards

Owen

















On Wed, 25 May 2005 11:20:43 +0100
Owen Synge <[log in to unmask]> wrote:

> On Wed, 25 May 2005 11:02:48 +0100
> Kostas Georgiou <[log in to unmask]> wrote:
>
> > On Wed, May 25, 2005 at 10:47:15AM +0100, Owen Synge wrote:
> >
> > > On Wed, 25 May 2005 09:32:45 +0100
> > > Alessandra Forti <[log in to unmask]> wrote:
> > >
> > > > Hi Mona,
> > > >
> > > > I don't think it will work that easily. Somene tried already a yaim
> > > > installation on a RHEL4 32 bits and there were problems with the
> > > > dependencies. Besides you should check if dcache, globus, srm.... already
> > > > have a 64bit version.
> > > >
> > > > cheers
> > > > alessandra
> > >
> > > As I said before I would use SL3 as everyone in tier 1 and tier 0 use SL3
> > > for most things.
> >
> > The RHEL3 based kernels have problems with disks above 1TB/2TB. Since the
> > system has a 3ware card with 3TB of data using the system with RHEL3 was
> > impossible until recently[1] without using two seperate raid5 volumes
> > which means you loose another 250GB for it.
> > Performance is also much much better in RHEL4 compared to the old release.
> >
> > [1] The latest 3ware firmware/driver that was released recently supports
> > autocarving above 2TB now but i haven't tested it. It might not solve the
> > problem though since 2TB is still above the "officially" 1TB device limit
> > in RHEL3 (some drivers work fine with 2TB some don't).
> >
> > > I shall give you feed back from D-Cache about support on 64 bits soon as
> > > I get the feedback myself.
> >
> > Since D-Cache is java based it shouldn't matter at all where it's running.
> > Just ignore the LCG provided rpms iand hand pick the ones that you *really*
> > need (possibly building new rpms for them) and everything should be fine.
>
> Unfortunately the D-Cache we interact with is Java based, I think the pnfs
> system has quite a lot of C in it. I am still awaiting feedback.
>
> An unofficial email response I have received so far has stated :
>
> "LCG distribution on IA64/SLC3. So far the IA64 nodes work well and they
> pass all tests." Although their where issues with RGMA. but since RGMA is not yet a service with dependencies this is not critical to us all.
>
> I am seeking an update as more issues may have been found and resolved.
>
> Regards
>
> Owen

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