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Berkeley DB: DB->set_q_extentsize
DB->set_q_extentsize
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#include <db.h>
int
DB->set_q_extentsize(DB *db, u_int32_t extentsize);
Description
Set the size of the extents used to hold pages in a Queue database,
specified as a number of pages. Each extent is created as a separate
physical file. If no extent size is set, the default behavior is to
create only a single underlying database file.
For information on tuning the extent size, see
Selecting a extent size.
The DB->set_q_extentsize interface may be used only to configure Berkeley DB before
the DB->open interface is called.
The DB->set_q_extentsize function returns a non-zero error value on failure and 0 on success.
Errors
The DB->set_q_extentsize function may fail and return a non-zero error for the following conditions:
- EINVAL
- An invalid flag value or parameter was specified.
Called after DB->open was called.
The DB->set_q_extentsize function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB->set_q_extentsize function may fail and return
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
See Also
db_create,
DB->associate,
DB->close,
DB->cursor,
DB->del,
DB->err, DB->errx
DB->fd,
DB->get,
DB->pget,
DB->get_byteswapped,
DB->get_type,
DB->join,
DB->key_range,
DB->open,
DB->put,
DB->remove,
DB->rename,
DB->set_alloc,
DB->set_append_recno,
DB->set_bt_compare,
DB->set_bt_minkey,
DB->set_bt_prefix,
DB->set_cachesize,
DB->set_dup_compare,
DB->set_errcall,
DB->set_errfile,
DB->set_errpfx,
DB->set_feedback,
DB->set_flags,
DB->set_h_ffactor,
DB->set_h_hash,
DB->set_h_nelem,
DB->set_lorder,
DB->set_pagesize,
DB->set_paniccall,
DB->set_q_extentsize,
DB->set_re_delim,
DB->set_re_len,
DB->set_re_pad,
DB->set_re_source,
DB->stat,
DB->sync,
DB->truncate,
DB->upgrade,
and
DB->verify.
Copyright Sleepycat Software
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