Proposed move of old data and new work disk.

Oct 2006
Bob Michaels
in conjunction with JLab Computer Center

We have been given 4 TB of new disk.  Meanwhile, some old
disk servers will be decommissioned, totalling 3.2 GB.
(The total Hall A allocation is 13 TB).

The plan is to move the old data to the new servers, 
provided files are less than 3 years old.  Files older
than 3 years will not be copied.  After the copy, the
directories will appear the same -- links will still work,
i.e. /work/halla/e02013/disk2 will point to the data,
albeit on a different physical disk.  After the copy, the
old disks will still exist read-only for 2 weeks with 
the string "old" appended to the name.  This way, users
can recover files I may have failed to copy.  Users cannot 
write to these old disks. 

In addition,the next 3 experiments will get new work
disk space, and some "shared" disk will be created to 
satisfy standing requests.

As always, remember that work disk is SCRATCH DISK and
is NOT BACKED UP.   Keep important files in MSS or /u/home.

Detailed schedule:
=================

1. Mon Oct 23, make links to "/work/halla...NEW"
   (see example in step 3)

2. Start copying all experiments on obsolete servers
   fs17, sfs24, sfs27, and sfs28.
   Files older than 3 years are not copied.

3. (est) Wed Oct 25, rename links by removing "NEW".
   The old disks become "OLD" and are read-only.
   Example:
   ^^^^^^^
     /work/halla/e02013/disk2 on fs17:/w/work1701
          copied to /work/halla/e02013/disk2.NEW
     After copying, the area on 1701 is renamed
     /work/halla/e02013/disk2.OLD and is read-only
     The link "disk2.NEW" becomes "disk2" (drop "NEW").

4. Wed Nov 8, the obsolete servers are decomissioned.


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

   APPENDIX  
Total Hall A Work Space -- On Oct 2006

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Filesystems that will be moved are indicated.  They are on 
"extinct" fileservers.  For completeness, all filesystems
are shown as well.


Filesystem           1K-blocks      Used Available Use% Mounted on

================  All fs17 disks marked for extinction ==============
fs17:/export/work1701
                     480196488 433853456  46343032  91% /w/work1701
fs17:/export/work1702
                     240094248 224858808  15235440  94% /w/work1702
fs17:/export/work1703
                     240094248 217792544  22301704  91% /w/work1703
fs17:/export/work1704
                     240102248 164420464  75681784  69% /w/work1704
fs17:/export/work1705
                     240094248 219786984  20307264  92% /w/work1705
fs17:/export/work1706
                     240094248 210114552  29979696  88% /w/work1706
fs17:/export/work1707
                     240094248 221789976  18304272  93% /w/work1707


================  The sfs24 disk is marked for extinction ==============
sfs24:/export/work2404
                     286901944 257778544  29123400  90% /w/work2404

================  All sfs27 disks marked for extinction ==============
sfs27:/export/work2703
                     255972560 216044776  39927784  85% /w/work2703
sfs27:/export/work2704
                     286901944 257942096  28959848  90% /w/work2704

================  All sfs28 disks marked for extinction ==============
sfs28:/export/work2804
                     263642664 250784104  12858560  96% /w/work2804
sfs28:/export/work2805
                     255972528 156687264  99285264  62% /w/work2805
sfs28:/export/work2806
                     255972560 221221256  34751304  87% /w/work2806

=========== The rest is untouched =========================

sfs31:/export/work3101
                     482300888 430617128  46783856  91% /w/work3101
sfs31:/export/work3102
                     143438744 113032000  23120464  84% /w/work3102
sfs31:/export/work3103
                     143438744  35732832 100419632  27% /w/work3103
sfs31:/export/work3104
                     143438712 126821368   9331080  94% /w/work3104
sfs31:/export/work3105
                     241153600 211278432  17625208  93% /w/work3105
sfs31:/export/work3106
                     241153600 188849096  40054544  83% /w/work3106
sfs31:/export/work3107
                     143430712  94344888  41799944  70% /w/work3107
sfs35:/export/work3503
                     841653224 598499752 234736944  72% /w/work3503
sfs35:/export/work3504
                     841632976 759059096  74157552  92% /w/work3504
sfs36:/export/work3603
                     842637768 739472688  94738704  89% /w/work3603
sfs36:/export/work3604
                     842610184 739186608  94997472  89% /w/work3604
sfs39:/export/work3901
                     842637768 767769216  66442176  93% /w/work3901
sfs41:/export/work4103
                     842637792 197720000 636491424  24% /w/work4103


panfs://panfs/halla-volume1
                     781250000 769531836  11718164  99% /p/halla-volume1
panfs://panfs/halla-volume2
                     781250000 758703648  22546352  98% /p/halla-volume2
panfs://panfs/halla-volume3
                     419921872 419407072    514800 100% /p/halla-volume3
panfs://panfs/halla-volume4
                     419921872       108 419921764   1% /p/halla-volume4
panfs://panfs/halla-volume5
                     419921872 381314040  38607832  91% /p/halla-volume5
panfs://panfs/halla-volume6
                     419921872 400312204  19609668  96% /p/halla-volume6