/*
* __wt_las_create --
* Initialize the database's lookaside store.
*/
int
__wt_las_create(WT_SESSION_IMPL *session)
{
WT_CONNECTION_IMPL *conn;
uint32_t session_flags;
const char *drop_cfg[] = {
WT_CONFIG_BASE(session, WT_SESSION_drop), "force=true", NULL };
conn = S2C(session);
/*
* Done at startup: we cannot do it on demand because we require the
* schema lock to create and drop the table, and it may not always be
* available.
*
* Discard any previous incarnation of the table.
*/
WT_RET(__wt_session_drop(session, WT_LAS_URI, drop_cfg));
/* Re-create the table. */
WT_RET(__wt_session_create(session, WT_LAS_URI, WT_LAS_FORMAT));
/*
* Open a shared internal session used to access the lookaside table.
* This session should never be tapped for eviction.
*/
session_flags = WT_SESSION_LOOKASIDE_CURSOR | WT_SESSION_NO_EVICTION;
WT_RET(__wt_open_internal_session(
conn, "lookaside table", true, session_flags, &conn->las_session));
/* Flag that the lookaside table has been created. */
F_SET(conn, WT_CONN_LAS_OPEN);
return (0);
}
/*
* __wt_las_create --
* Initialize the database's lookaside store.
*/
int
__wt_las_create(WT_SESSION_IMPL *session)
{
WT_CONNECTION_IMPL *conn;
WT_DECL_RET;
const char *drop_cfg[] = {
WT_CONFIG_BASE(session, WT_SESSION_drop), "force=true", NULL };
conn = S2C(session);
/*
* Done at startup: we cannot do it on demand because we require the
* schema lock to create and drop the file, and it may not always be
* available.
*
* Open an internal session, used for the shared lookaside cursor.
*
* Sessions associated with a lookaside cursor should never be tapped
* for eviction.
*/
WT_RET(__wt_open_internal_session(
conn, "lookaside table", 1, 1, &conn->las_session));
session = conn->las_session;
F_SET(session, WT_SESSION_LOOKASIDE_CURSOR | WT_SESSION_NO_EVICTION);
/* Discard any previous incarnation of the file. */
WT_RET(__wt_session_drop(session, WT_LAS_URI, drop_cfg));
/* Re-create the file. */
WT_RET(__wt_session_create(session, WT_LAS_URI, WT_LAS_FORMAT));
/* Open the shared cursor. */
WT_WITHOUT_DHANDLE(session,
ret = __las_cursor_create(session, &conn->las_cursor));
return (ret);
}
