Re: [Bacula-users] Concurrent despooling Data with Concurrent Jobs

On 8/9/12 10:18 AM, "Jummo" <jummo AT devio DOT us> wrote:


>Hi Patti,
>
>On Thu, 9 Aug 2012, Clark, Patricia A. wrote:
>
>> I have had multiple jobs assigned to the same tape drive.  If there is
>> space and none of the thresholds have been reached, the spooling jobs do
>> continue their spooling.  If a job B is ready to despool to tape and
>>job A
>> is despooling, job B will wait its turn.  The status on the storage
>> changer will provide the current state of each job, including the
>>despool
>> wait.  I also check the timestamps on the spool files to make sure
>>things
>> are still moving along.
>
>Hm, I don't see any despool waits. Which version to you use, mine is
>5.2.10. Where to use set the Maximum Concurrent Jobs parameter? Or do
>you use a special "only one despooling at any time" paremeter?
>
>Thanks,
>
>  - Jummo

I am using v5.2.10.  Here is a snippet of my status command on my changer
- in the running jobs section it has the spooling status for each running
job.  The 3rd job down shows the despool_wait=1.  By using spooling,
bacula will only write one job to the tape drive at a time.  When the
first job below completes this despooling session, it will spool again.
That is when the 3rd job will despool to tape. This will repeat until one
of them completes.  In the meantime, it is possible for other jobs to
start and do the same thing on the same drive or on one of the other
drives.  I allow up to 4 jobs on each of my drives, 20 jobs on my
changer(both the director and sd files), and 20 jobs for mybackupserver
client definition.

*status storage=Changer
Connecting to Storage daemon Changer at mybackupserver:9103

mybackupserver-sd Version: 5.2.10 (28 June 2012) x86_64-redhat-linux-gnu
redhat Enterprise release
Daemon started 08-Aug-12 18:50. Jobs: run=38, running=4.
 Heap: heap=290,816 smbytes=20,736,871 max_bytes=50,179,762 bufs=653
max_bufs=1,036
 Sizes: boffset_t=8 size_t=8 int32_t=4 int64_t=8 mode=0,0

Running Jobs:
Writing: Full Backup job TEST_rnsd_dirs2 JobId=1231 Volume="070137L5"
    pool="TEST" device="LTO5-2" (/dev/tape-admin2)
    spooling=0 despooling=1 despool_wait=0
    Files=224,764 Bytes=314,901,198,833 Bytes/sec=5,647,135
    FDReadSeqNo=6,098,063 in_msg=5653388 out_msg=5 fd=15
Writing: Incremental Backup job TEST_b10s01_h4 JobId=1235 Volume="071530L5"
    pool="TEST" device="LTO5-4" (/dev/tape-admin4)
    spooling=0 despooling=1 despool_wait=0
    Files=75,956 Bytes=260,045,185,973 Bytes/sec=5,521,129
    FDReadSeqNo=4,582,688 in_msg=4356836 out_msg=5 fd=34
Writing: Incremental Backup job TEST_chem_dirs4 JobId=1256
Volume="070137L5"
    pool="TEST" device="LTO5-2" (/dev/tape-admin2)
    spooling=0 despooling=0 despool_wait=1
    Files=1 Bytes=11,227 Bytes/sec=0
    FDReadSeqNo=16 in_msg=12 out_msg=9 fd=70
Writing: Full Backup job TEST_cnms_dirs3 JobId=1262 Volume="071531L5"
    pool="TEST" device="LTO5-5" (/dev/tape-admin5)
    spooling=0 despooling=1 despool_wait=0
    Files=347,757 Bytes=337,466,130,258 Bytes/sec=7,208,042
    FDReadSeqNo=7,059,078 in_msg=6398680 out_msg=5 fd=33
Writing: Full Backup job TEST_rnsd_dirs5 JobId=1268 Volume="071575L5"
    pool="TEST" device="LTO5-1" (/dev/tape-admin1)
    spooling=0 despooling=1 despool_wait=0
    Files=99,863 Bytes=277,192,264,157 Bytes/sec=6,007,764
    FDReadSeqNo=4,785,162 in_msg=4590166 out_msg=5 fd=20
====

Jobs waiting to reserve a drive:
====
<snip>

Patti


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