Re: [BLAST_SHIFTS] [BLAST_ANAWARE] /home/blast

From: Douglas Hasell (hasell@mit.edu)
Date: Tue Jun 15 2004 - 20:06:57 EDT


Hi,

        I have suggested this a few times. The argument against it is that we
backup /home and if we put a large disk there and it grows in size as
one can expect then backups become a problem.

        I think there are solutions to this, like mirrored disks rather than
backups for instance, which should be investigated.

                                                                         
                      Cheers,
                                                                         
                                      Douglas

26-415 M.I.T.
Tel: +1 (617) 258-7199
77 Massachusetts Avenue Fax: +1 (617)
258-5440
Cambridge, MA 02139, USA E-mail:
hasell@mit.edu
On Jun 15, 2004, at 6:27 PM, Chi Zhang wrote:

>
> I agree with Taylan. In order to minimize my home usage, I have moved
> everything possible to scratchs leaving only links and system
> configuations on my home dir. But it has become more and more awkward
> to
> work with since we have more computers and home/blast is pretty much
> the
> only one visible from all machines.
>
> Also I wonder if a Mozilla can be installed on /home/blast for all
> users.
> I know more than one of us got fed up with netscape and intalled our
> own
> mozilla in our home dir. It is good for our work, browsing root
> documentation and so on :)
>
> Chi
>
> On Tue, 15 Jun 2004, Taylan Akdogan wrote:
>
>> Hi,
>>
>> While we are at it, I'd like to put in my 2-cents worth:
>>
>> Although, we are supposed to use the scratch area for large (and
>> replaceable) files, it is apparent that the usage of /home/blast
>> is always close to its maxima (~20GB). Somehow, people need to
>> use their home directories rather than the scratch area, thus we
>> manage to fill it up to 100.0% from time to time. For one thing,
>> it is accessible from all machines (read convenience!). I -try-
>> to keep my usage below 0.5GB, which is not small. And there are
>> many other users who have similar usage rate (see the attached
>> figure for all of 80 accounts.) No matter what we do, the usage
>> will hardly be below 60%-70% (I'm optimistic!) which is a
>> comfortable level considering the possible fluctuations.
>>
>> After this introduction, here we go: Can we get a considerably
>> larger disk for /home/blast? After all it is only 20GB, and we
>> are at the age of 400GB disks (see the new Seagate SATA drives -
>> nowadays, the minimum 3.5"-disk capacity is well above 20GB!
>> 20GBs are used for mp3 players!). I'm sure the price (even for
>> SCSI) is not an issue here, if we compare it to the maintenance
>> and productivity loss due to the disk-full-down-times which
>> happens every now and then...
>>
>> Taylan
>>
>> On Tue, 15 Jun 2004, Ernie Bisson, MIT Bates Linear Accelerator wrote:
>>
>>>
>>>> ... is full again. Here are the GB users:
>>>>
>>>> 2588692 /home/blast/adrian
>>>> 3426252 /home/blast/ajmasch
>>>> 1105760 /home/blast/hasell
>>>> 1721316 /home/blast/karpiusp
>>>> 1045356 /home/blast/wangxu
>>>
>>> I see also that /home/daq is quite full too, even though I was under
>>> the
>>> impression that it's disk usage should not increase dramatically. On
>>> March
>>> 12th it was using about 6 gigabytes, while today it is using 8. I do
>>> have
>>> some space available on the server to increase both of their
>>> capacities,
>>> along with some other repartitioning I would like to do on the
>>> server. A
>>> fair amount of downtime of the partitions will be necessary during
>>> that
>>> time. My original plan, before /home/daq started to fill up, was to
>>> increase
>>> the capacity on /home/blast by about 6 gigabytes, as well as
>>> /home/daq by
>>> about 350 megabytes. This plan would require the minimal amount of
>>> file
>>> movement.
>>>
>>> Can /home/daq be cleaned up a bit so that a 350 megabyte increase
>>> would be
>>> sufficient?
>>>
>>> Obviously during a shutdown is the optimal time for any major file
>>> server
>>> reconfiguration.
>>>
>>> Ernie
>>>
>>
>> --
>> ---=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=---
>> Taylan Akdogan Massachusetts Institute of Technology
>> akdogan@mit.edu Department of Physics
>> Phn:+1-617-258-0801 Laboratory for Nuclear Science
>> Fax:+1-617-258-5440 Room 26-402b
>> ---=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=---
>>
>>



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