Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Mon, Sep 14, 2009 at 10:43 AM, David Glick wrote: > On Sep 14, 2009, at 7:04 AM, Jim Fulton wrote: >> >> On Mon, Sep 14, 2009 at 7:10 AM, Chris Withers >> wrote: >>> >>> Jim Fulton wrote: ZODB doesn't provide any direct support because it has no notion of tree. >>> >>> Does it have any notion of object size on disk for a given object? >> >> Not directly, but you can do: >> >> len(ob._p_jar.db().storage.load(ob._p_oid, '')[0])+42 > > > What's the extra 42 for? Aside from life, the universe, and everything... Database record header. There's also space for transaction meta data, but that's amorized over an unknown number of records. Jim -- Jim Fulton ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Sep 14, 2009, at 7:04 AM, Jim Fulton wrote: > On Mon, Sep 14, 2009 at 7:10 AM, Chris Withers > wrote: >> Jim Fulton wrote: >>> >>> ZODB doesn't provide any direct support because it has no notion >>> of tree. >> >> Does it have any notion of object size on disk for a given object? > > Not directly, but you can do: > > len(ob._p_jar.db().storage.load(ob._p_oid, '')[0])+42 What's the extra 42 for? Aside from life, the universe, and everything... David Glick Web Developer ONE/Northwest New tools and strategies for engaging people in protecting the environment http://www.onenw.org davidgl...@onenw.org work: (206) 286-1235 x32 mobile: (206) 679-3833 Subscribe to ONEList, our email newsletter! Practical advice for effective online engagement http://www.onenw.org/full_signup ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Mon, Sep 14, 2009 at 7:10 AM, Chris Withers wrote: > Jim Fulton wrote: >> >> ZODB doesn't provide any direct support because it has no notion of tree. > > Does it have any notion of object size on disk for a given object? Not directly, but you can do: len(ob._p_jar.db().storage.load(ob._p_oid, '')[0])+42 Jim -- Jim Fulton ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Sep 14, 2009, at 13:27 , Chris Withers wrote: Jens Vagelpohl wrote: Sadly, when you're trying to figure out which folder is using all the space on a disk that's running out of space, that's not practical... How about simply writing a script that crawls the ZODB and gives you paths and sizes? Indeed, and what's the magic incantation to get the size of the object as it is on disk? There is none that I know. I would simply look at the data items I know from the object in the ZODB. Like, I know how OFS.Image and OFS.File save their data and can determine the size that way. You would have to have knowledge about each type of object encountered. jens smime.p7s Description: S/MIME cryptographic signature ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On 14.09.09 13:27, Chris Withers wrote: > Jens Vagelpohl wrote: > >> >>> Sadly, when you're trying to figure out which folder is using all the >>> space on a disk that's running out of space, that's not practical... >>> >> How about simply writing a script that crawls the ZODB and gives you >> paths and sizes? >> > Indeed, and what's the magic incantation to get the size of the object > as it is on disk? Perhaps useful: https://bugs.launchpad.net/zodb/+bug/424172 (but pretty low-level). Andreas <>___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
Jens Vagelpohl wrote: > >> Sadly, when you're trying to figure out which folder is using all the >> space on a disk that's running out of space, that's not practical... > > How about simply writing a script that crawls the ZODB and gives you > paths and sizes? Indeed, and what's the magic incantation to get the size of the object as it is on disk? cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Sep 14, 2009, at 13:10 , Chris Withers wrote: Jim Fulton wrote: ZODB doesn't provide any direct support because it has no notion of tree. Does it have any notion of object size on disk for a given object? In Zope 2, you could export the folder and look at the size of the export. Sadly, when you're trying to figure out which folder is using all the space on a disk that's running out of space, that's not practical... How about simply writing a script that crawls the ZODB and gives you paths and sizes? jens smime.p7s Description: S/MIME cryptographic signature ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
Jim Fulton wrote: > ZODB doesn't provide any direct support because it has no notion of tree. Does it have any notion of object size on disk for a given object? > In Zope 2, you could export the folder and look at the size of the export. Sadly, when you're trying to figure out which folder is using all the space on a disk that's running out of space, that's not practical... Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] How do I find out the size of a subtree of the object graph?
On Mon, Sep 14, 2009 at 5:55 AM, Chris Withers wrote: > Hi All, > > As the subject line says with the following definitions: > > - size = size on disk, in Mb > > - subtee = Zope folderish type things, in this case... ZODB doesn't provide any direct support because it has no notion of tree. In Zope 2, you could export the folder and look at the size of the export. Jim -- Jim Fulton ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
[ZODB-Dev] How do I find out the size of a subtree of the object graph?
Hi All, As the subject line says with the following definitions: - size = size on disk, in Mb - subtee = Zope folderish type things, in this case... cheers, Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
