Alvaro Herrera wrote:
Bruce Momjian wrote:
Added to TODO:
* Improve detection of shared memory segments being used by other
FreeBSD jails
http://archives.postgresql.org/pgsql-hackers/2008-01/msg00656.php
There's a bit more than that to it -- see
Bruce Momjian wrote:
Added to TODO:
* Improve detection of shared memory segments being used by other
FreeBSD jails
http://archives.postgresql.org/pgsql-hackers/2008-01/msg00656.php
There's a bit more than that to it -- see
Added to TODO:
* Improve detection of shared memory segments being used by other
FreeBSD jails
http://archives.postgresql.org/pgsql-hackers/2008-01/msg00656.php
---
Mischa Sandberg wrote:
Here (@sophos.com) we run
Here (@sophos.com) we run machine cluster tests using FreeBSD jails. A
jail is halfway between a chroot and a VM. Jails blow a number of
assumptions about a unix environment: sysv ipc's are global to all
jails; but a process can only see other processes also running in the
jail. In fact, the
Mischa Sandberg [EMAIL PROTECTED] writes:
+ /* In a FreeBSD jail, you can't kill -0 a postmaster
+* running in a different jail, so the shm seg might
+* still be in use. Safer to test nattch ?
+*/
+ if (kill(1,0)
Quoting Tom Lane [EMAIL PROTECTED]:
Mischa Sandberg [EMAIL PROTECTED] writes:
+ /* In a FreeBSD jail, you can't kill -0 a
postmaster
+* running in a different jail, so the shm seg
might
+* still be in use. Safer to test nattch ?
+
Mischa Sandberg [EMAIL PROTECTED] writes:
Quoting Tom Lane [EMAIL PROTECTED]:
Mischa Sandberg [EMAIL PROTECTED] writes:
+ if (kill(1,0) errno == ESRCH
PGSharedMemoryIsInUse(0,NextShmemSegID))
+ continue;
Isn't the last part of that test backward? If
* Mischa Sandberg ([EMAIL PROTECTED]) wrote:
Here (@sophos.com) we run machine cluster tests using FreeBSD jails. A
jail is halfway between a chroot and a VM. Jails blow a number of
assumptions about a unix environment: sysv ipc's are global to all
jails; but a process can only see other
Stephen Frost [EMAIL PROTECTED] writes:
I've got a couple of concerns about this-
#1: Having the shared memory be global is a rather large problem when it
comes to something like PG which can have a fair bit of data going
through that area that could be sensitive.
Well, you'd have
[EMAIL PROTECTED] (Mischa Sandberg) writes:
Unfortunately, with multiple jails running PG servers and (due to app
limitations) all servers having same PGPORT, you get the situation that
when jail#2 (,jail#3,...) server comes up, it:
- detects that there is a shm seg with ipc key 5432001
- checks
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