Re: [zones-discuss] Scratch Zone - purpose
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6328286 Rob McDonald wrote: Hi All Can anyone explain what a scratch zone is or point me to a relevant document? Sincerely Rob McDonald ___ zones-discuss mailing list zones-discuss@opensolaris.org begin:vcard fn:Dr. Hung-Sheng Tsao (LaoTsao) n:Tsao;Hung-Sheng org:GEH;Sun GEH East adr:;;400 Atrium Dr;Somerset;nj;08873;usa email;internet:hung-sheng.t...@sun.com title:Sr. SE tel;work:1877319-0460 tel;fax:1877-319-0460 tel;pager:1973-495-0840 tel;home:1973495-0840 tel;cell:1973-495-0840 x-mozilla-html:TRUE url:http://blogs.sun.com/hstsao version:2.1 end:vcard ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Scratch Zone - purpose
Dr. Hung-Sheng Tsao (LaoTsao) writes: http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6328286 Rob McDonald wrote: Hi All Can anyone explain what a scratch zone is or point me to a relevant document? In addition to the above CR, see: http://www.opensolaris.org/os/community/arc/caselog/2005/474/ A scratch zone is a mechanism that allows us to mount up a zone that exists in an alternate boot environment (a separate system root). The zone can't be booted (it's not known whether all of the bits, including configuration, inside are runnable on the current kernel), but it's possible to make processes enter the zone, and common directories (such as /usr and /lib) have lofs mounts from the running system to allow some limited work to be done. Scratch zones are used as part of the upgrade process. They're intentionally undocumented, because they're meant to be an internal design detail. -- James Carlson, Solaris Networking james.d.carl...@sun.com Sun Microsystems / 35 Network Drive71.232W Vox +1 781 442 2084 MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677 ___ zones-discuss mailing list zones-discuss@opensolaris.org
Re: [zones-discuss] Scratch Zone - purpose
Many thanks. The papers in the link from James Carlson provide valuable insight into the Live Upgrade process, especially relating to issues we have been experiencing with upgrading non-global zones. Sincerely Rob McDonald -Original Message- From: James Carlson [mailto:james.d.carl...@sun.com] Sent: Thu 2/5/2009 05:23 PM To: Dr. Hung-Sheng Tsao (LaoTsao) Cc: Rob McDonald; zones-discuss@opensolaris.org Subject: Re: [zones-discuss] Scratch Zone - purpose Dr. Hung-Sheng Tsao (LaoTsao) writes: http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6328286 Rob McDonald wrote: Hi All Can anyone explain what a scratch zone is or point me to a relevant document? In addition to the above CR, see: http://www.opensolaris.org/os/community/arc/caselog/2005/474/ A scratch zone is a mechanism that allows us to mount up a zone that exists in an alternate boot environment (a separate system root). The zone can't be booted (it's not known whether all of the bits, including configuration, inside are runnable on the current kernel), but it's possible to make processes enter the zone, and common directories (such as /usr and /lib) have lofs mounts from the running system to allow some limited work to be done. Scratch zones are used as part of the upgrade process. They're intentionally undocumented, because they're meant to be an internal design detail. -- James Carlson, Solaris Networking james.d.carl...@sun.com Sun Microsystems / 35 Network Drive71.232W Vox +1 781 442 2084 MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677 ___ zones-discuss mailing list zones-discuss@opensolaris.org
