On Thu, 23 Mar 2017 09:58:35 +0100 Kern Sibbald <k...@sibbald.com> wrote:
> Thanks for mentioning that VolAddr is undocumented. That was an > oversight that I will fix. > > Please be aware that VolAddr is a relatively new bsr keyword, so it > will not work on older Bacula's such as 5.2.x. I don't remember when > it was implemented. Too bad for us: for administrative reasons we're stuck with 5.2.6 on the box which is our tape SD. > Note also: VolAddr is formed as you say for File and Tape volumes, > but in the next version of Bacula, VolAddr is used for Cloud Volumes > and the algorithm is not the same. I will document it once it is > released. Bottom line each driver, File, Tape, Aligned, Dedup, > Cloud, ... has its own 64 bit VolAddr representation of the address. > In this next version for File volumes for example, there is no longer > any concept of File and Block there is only a 64 bit address. For > tapes, due to their architecture (currently) we still must have File > and Block. OK, so given that I can't use VolAddr with 5.2.6's bextract, is there a way to make use of the two pairs of File+Block values extracted for a particular job from the output of `bls -j` to create a sensible spec for the bootstrap file to speed up extracts using `bextract`? To provide an "executive summary" of our situation: - We have old tapes with many backup sessions. These sessions are always recorded sequentially; no jobs overlap. - `bls -j` extracts two pairs of File+Block values for each job: the first denotes the beginning of the job, and the latter -- its end. - We'd like to write a script which would consume the output of `bls -j` and produce a single bootstrap file for each job found, and we'd like these bootstrap files to somehow refer to those low-level "addresses" to speed up extractions via `bextract`. Is there a way to do what we need w/o using VolAddr? (Extraction based only on the list of file names takes more that two hours for our LTO-4 drive and a full tape; this is unwieldy, and it's sad to watch `bextract` scan the whole tape while it could be told to just scan from there to there -- if only we knew how to do that.) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
