* Kern Sibbald schrieb am 11.02.08 um 18:16 Uhr:
> Hello,
>
> Attached, you will find a patch that I am proposing to release. Feedback
> would be appreciated.
looks like the patch is a reverse one...
-Marc
>
> Best regards,
>
> Kern
>
> On Sunday 10 February 2008 04.52:26 Peter Much wrote:
> > Abstract:
> > ---------
> > Migration jobs do not insert the jobmedia.startfile attribute
> > in the catalog.
> >
> >
> > Impact:
> > -------
> > Very slow restore.
> >
> >
> > Example:
> > --------
> > bacula=> select jobid,name,type,jobfiles,poolid,priorjobid from job
> > where jobid=1728 or jobid=1729 or jobid=1748 or jobid=1749
> > order by jobid;
> > jobid | name | type | jobfiles | poolid | priorjobid
> > -------+--------------------+------+----------+--------+------------
> > 1728 | HomeDirsDisp | B | 4398 | 5 | 0
> > 1729 | HomeDirsDisp | M | 4398 | 2 | 0
> > 1748 | MoveToTapeInternal | g | 0 | 5 | 0
> > 1749 | HomeDirsDisp | B | 4398 | 5 | 1729
> > (4 rows)
> >
> > -> job 1728 saves directly to pool 5. Job 1729 saves the same data
> > to pool 2, and migrating job 1748/1749 moves it on to pool 5.
> >
> > bacula=> select jobid,firstindex,lastindex,startfile,endfile,
> > startblock,endblock from jobmedia
> > where jobid=1728 or jobid=1729 or jobid=1748 or jobid=1749
> > order by jobid;
> > jobid | firstindex | lastindex | startfile | endfile | startblock |
> > endblock
> > -------+------------+-----------+-----------+---------+------------+-------
> >---- 1728 | 1 | 4398 | 55 | 55 | 0 |
> > 3466 1729 | 1 | 4398 | 0 | 0 | 217 |
> > 223662044 1749 | 1 | 4398 | 0 | 56 | 0
> > | 3466 (3 rows)
> >
> > -> Job 1728 sets startfile attribute, migrate job 1749 sets just 0.
> >
> >
> > Comment:
> > --------
> > 1. I have tried to fix the StartFile issue, so that my restores
> > run better. I have not further checked how the other data are
> > derived on Migration and if there may be more problems.
> > Usually I do such, but I was tired at that point. ;)
> >
> > 2. The existence of jcr->dcr is checked twice in that function,
> > once right after entry, and once at label "ok_out:". Could it
> > be something "stealing" this object inflight?
> > If so, then my earlier using of "dev" as a shorthand for
> > jcr->dcr->dev is illegitim, and things need to be written
> > more cumbersomely.
> > (I have obviousely not gone into the layout of the whole
> > software conception already; therefore these patches should
> > be considered more as suggestions to where the problem seems
> > to arise, and not so much as readymade fixes!)
> >
> > Patch:
> > ------
> > --- src/stored/mac.c.orig Wed Oct 3 13:36:47 2007
> > +++ src/stored/mac.c Sun Feb 10 04:28:54 2008
> > @@ -89,7 +89,7 @@
> > }
> >
> > Dmsg3(200, "Found %d volumes names for %s. First=%s\n",
> > jcr->NumReadVolumes, - jcr->VolList->VolumeName, Type);
> > + Type, jcr->VolList->VolumeName);
> >
> > /* Ready devices for reading and writing */
> > if (!acquire_device_for_read(jcr->read_dcr) ||
> > @@ -98,8 +98,26 @@
> > goto bail_out;
> > }
> >
> > - Dmsg2(200, "===== After acquire pos %u:%u\n", jcr->dcr->dev->file,
> > jcr->dcr->dev->block_num); + dev = jcr->dcr->dev;
> > + Dmsg2(200, "===== After acquire pos %u:%u\n", dev->file,
> > dev->block_num);
> >
> > + /* On MIGRATE we must setup some dcr jobmedia data. On BACKUP
> > + * this is done in write_session_label().
> > + */
> > + switch(jcr->JobType) {
> > + case JT_MIGRATE:
> > + if (dev->is_tape()) {
> > + jcr->dcr->StartBlock = dev->block_num;
> > + jcr->dcr->StartFile = dev->file;
> > + } else {
> > + jcr->dcr->StartBlock = (uint32_t)dev->file_addr;
> > + jcr->dcr->StartFile = (uint32_t)(dev->file_addr >> 32);
> > + }
> > + break;
> > + default:
> > + break;
> > + }
> > +
> > set_jcr_job_status(jcr, JS_Running);
> > dir_send_job_status(jcr);
> >
> > @@ -117,7 +135,6 @@
> >
> > ok_out:
> > if (jcr->dcr) {
> > - dev = jcr->dcr->dev;
> > if (ok || dev->can_write()) {
> > /* Flush out final partial block of this session */
> > if (!write_block_to_device(jcr->dcr)) {
> >
> > -------------------------------------------------------------------------
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>
>
>
> This patch fixes a migration bug that always has a zero index entry
> (JobMedia record) as the first entry. This causes Bacula to search
> for the first record during a restore rather than seek directly to
> it.
>
> Apply this patch to Bacula 2.2.8 (and possibly any prior 2.2.x version) with:
>
> cd <bacula-source>
> patch -p0 <2.2.8-jobmedia.patch
> ./configure <your-options>
> make
> ...
> make install
>
>
> Index: src/stored/device.c
> ===================================================================
> --- src/stored/device.c (revision 6391)
> +++ src/stored/device.c (working copy)
> @@ -1,7 +1,7 @@
> /*
> Bacula® - The Network Backup Solution
>
> - Copyright (C) 2000-2008 Free Software Foundation Europe e.V.
> + Copyright (C) 2000-2007 Free Software Foundation Europe e.V.
>
> The main author of Bacula is Kern Sibbald, with contributions from
> many others, a complete list can be found in the file AUTHORS.
> @@ -200,6 +200,19 @@
> return ok; /* device locked */
> }
>
> +void set_start_vol_position(DCR *dcr)
> +{
> + DEVICE *dev = dcr->dev;
> + /* Set new start position */
> + if (dev->is_tape()) {
> + dcr->StartBlock = dev->block_num;
> + dcr->StartFile = dev->file;
> + } else {
> + dcr->StartBlock = (uint32_t)dev->file_addr;
> + dcr->StartFile = (uint32_t)(dev->file_addr >> 32);
> + }
> +}
> +
> /*
> * We have a new Volume mounted, so reset the Volume parameters
> * concerning this job. The global changes were made earlier
> @@ -208,24 +221,11 @@
> void set_new_volume_parameters(DCR *dcr)
> {
> JCR *jcr = dcr->jcr;
> - DEVICE *dev = dcr->dev;
> if (dcr->NewVol && !dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
> Jmsg1(jcr, M_ERROR, 0, "%s", jcr->errmsg);
> }
> - /* Set new start/end positions */
> - if (dev->is_tape()) {
> - dcr->StartBlock = dev->block_num;
> - dcr->StartFile = dev->file;
> - } else {
> - dcr->StartBlock = (uint32_t)dev->file_addr;
> - dcr->StartFile = (uint32_t)(dev->file_addr >> 32);
> - }
> - /* Reset indicies */
> - dcr->VolFirstIndex = 0;
> - dcr->VolLastIndex = 0;
> + set_new_file_parameters(dcr);
> jcr->NumWriteVolumes++;
> - dcr->NewVol = false;
> - dcr->WroteVol = false;
> }
>
> /*
> @@ -235,16 +235,8 @@
> */
> void set_new_file_parameters(DCR *dcr)
> {
> - DEVICE *dev = dcr->dev;
> + set_start_vol_position(dcr);
>
> - /* Set new start/end positions */
> - if (dev->is_tape()) {
> - dcr->StartBlock = dev->block_num;
> - dcr->StartFile = dev->file;
> - } else {
> - dcr->StartBlock = (uint32_t)dev->file_addr;
> - dcr->StartFile = (uint32_t)(dev->file_addr >> 32);
> - }
> /* Reset indicies */
> dcr->VolFirstIndex = 0;
> dcr->VolLastIndex = 0;
> Index: src/stored/mac.c
> ===================================================================
> --- src/stored/mac.c (revision 6391)
> +++ src/stored/mac.c (working copy)
> @@ -1,15 +1,7 @@
> /*
> - * SD -- mac.c -- responsible for doing
> - * migration, archive, and copy jobs.
> - *
> - * Kern Sibbald, January MMVI
> - *
> - * Version $Id$
> - */
> -/*
> Bacula® - The Network Backup Solution
>
> - Copyright (C) 2006-2006 Free Software Foundation Europe e.V.
> + Copyright (C) 2006-2008 Free Software Foundation Europe e.V.
>
> The main author of Bacula is Kern Sibbald, with contributions from
> many others, a complete list can be found in the file AUTHORS.
> @@ -33,6 +25,14 @@
> (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
> Switzerland, email:[EMAIL PROTECTED]
> */
> +/*
> + * SD -- mac.c -- responsible for doing
> + * migration, archive, and copy jobs.
> + *
> + * Kern Sibbald, January MMVI
> + *
> + * Version $Id$
> + */
>
> #include "bacula.h"
> #include "stored.h"
> @@ -108,6 +108,7 @@
>
> jcr->dcr->VolFirstIndex = jcr->dcr->VolLastIndex = 0;
> jcr->run_time = time(NULL);
> + set_start_vol_position(jcr->dcr);
>
> ok = read_records(jcr->read_dcr, record_cb, mount_next_read_volume);
> goto ok_out;
> Index: src/stored/protos.h
> ===================================================================
> --- src/stored/protos.h (revision 6391)
> +++ src/stored/protos.h (working copy)
> @@ -126,6 +126,7 @@
> bool open_device(DCR *dcr);
> bool first_open_device(DCR *dcr);
> bool fixup_device_block_write_error(DCR *dcr);
> +void set_start_vol_position(DCR *dcr);
> void set_new_volume_parameters(DCR *dcr);
> void set_new_file_parameters(DCR *dcr);
> bool is_device_unmounted(DEVICE *dev);
> -------------------------------------------------------------------------
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