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| icimjs at loop.com |
 Posted: Tue Jun 15, 1999 7:41 am |
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Guest
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Hi,
what is the shortest instruction for implementing a diskbased mnesia table?
TIA,
Elan
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| ulf.wiger at etx.ericsson |
| Posted: Tue Jun 15, 1999 7:51 am |
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Guest
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Elan wrote:
>
> Hi,
>
> what is the shortest instruction for implementing a diskbased mnesia table?
>
> TIA,
>
> Elan
mnesia:create_table(TableName, [{disc_copies, [node()]},
{attributes, [...]}]).
will create a table which resides on disk and in RAM on the current
node.
mnesia:create_table(TableName, [{disc_only_copies, [node()]},
{attributes, [...]}]).
will create a table which resides on disk only.
Typically, attributes are given with the following construct:
{attributes, record_info(fields, RecName)}
If you want the entire sequence of commands:
erl -sname foo
foo_at_hostname 1> mnesia:create_schema([node()]).
foo_at_hostname 2> mnesia:start().
foo_at_hostname 3> mnesia:create_table(...).
This will:
1. start an Erlang node with the "shortname" foo_at_<hostname>
2. create a mnesia schema under <CWD>/Mnesia.foo_at_<hostname>/
3. start mnesia
4. create a table as above
/Uffe
--
Ulf Wiger, Chief Designer AXD 301 <ulf.wiger_at_etx.ericsson.se>
Ericsson Telecom AB tfn: +46 8 719 81 95
Varuv |
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