From: | "Randall Parker" <randall(at)nls(dot)net> |
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To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Big 7.1 open items |
Date: | 2000-06-22 05:11:50 |
Message-ID: | 05092999848341@mail.nls.net |
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Thread: | |
Lists: | pgsql-hackers |
Tom,
A "container" can be a file or a device or a directory. Here again are examples that I already posted in
another thread:
In the first example there are 3 devices specified as containers. In the second example 3 directories are
specified as containers (DB2 therefore makes its own file names in it - and uses OIDs to do it I think). In
the third example 2 files are the 2 containers. In the fourth example 6 devices on 3 nodes are the
containers.
CREATE TABLESPACE PAYROLL
MANAGED BY DATABASE
USING (DEVICE'/dev/rhdisk6' 10000,
DEVICE '/dev/rhdisk7' 10000,
DEVICE '/dev/rhdisk8' 10000)
OVERHEAD 24.1
TRANSFERRATE 0.9
CREATE TABLESPACE ACCOUNTING
MANAGED BY SYSTEM
USING ('d:\acc_tbsp', 'e:\acc_tbsp', 'f:\acc_tbsp')
EXTENTSIZE 64
PREFETCHSIZE 32
CREATE TEMPORARY TABLESPACE TEMPSPACE2
MANAGED BY DATABASE
USING (FILE '/tmp/tempspace2.f1' 50000,
FILE '/tmp/tempspace2.f2' 50000)
EXTENTSIZE 256
CREATE TABLESPACE PLANS
MANAGED BY DATABASE
USING (DEVICE '/dev/rhdisk0' 10000, DEVICE '/dev/rn1hd01' 40000) ON NODE 1
USING (DEVICE '/dev/rhdisk0' 10000, DEVICE '/dev/rn3hd03' 40000) ON NODE 3
USING (DEVICE '/dev/rhdisk0' 10000, DEVICE '/dev/rn5hd05' 40000) ON NODE 5
On Wed, 21 Jun 2000 23:03:03 -0400, Tom Lane wrote:
>"Randall Parker" <randall(at)nls(dot)net> writes:
>> DB2 supports an ALTER TABLESPACE command that allows one to add new
>> containers to an existing tablespace. IMO, that's far more supportive
>> of 24x7 usage.
>
>Er, what do they mean by "container", and why is it better?
>
> regards, tom lane
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