80 lines
3.1 KiB
C
80 lines
3.1 KiB
C
/*---
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This software is copyrighted by the Regents of the University of
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California, and other parties. The following terms apply to all files
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associated with the software unless explicitly disclaimed in
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individual files.
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The authors hereby grant permission to use, copy, modify, distribute,
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and license this software and its documentation for any purpose,
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provided that existing copyright notices are retained in all copies
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and that this notice is included verbatim in any distributions. No
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written agreement, license, or royalty fee is required for any of the
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authorized uses. Modifications to this software may be copyrighted by
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their authors and need not follow the licensing terms described here,
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provided that the new terms are clearly indicated on the first page of
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each file where they apply.
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IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
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FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
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DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND
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THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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GOVERNMENT USE: If you are acquiring this software on behalf of the
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U.S. government, the Government shall have only "Restricted Rights" in
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the software and related documentation as defined in the Federal
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Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you are
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acquiring the software on behalf of the Department of Defense, the
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software shall be classified as "Commercial Computer Software" and the
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Government shall have only "Restricted Rights" as defined in Clause
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252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the
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authors grant the U.S. Government and others acting in its behalf
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permission to use and distribute the software in accordance with the
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terms specified in this license.
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---*/
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/**
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* @file
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*
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* Implementation of log truncation for Stasis
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*
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* @todo TRUNCATE_INTERVAL should be dynamically set...
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* @todo log truncation policy should be set of the percentage of the log that can be truncated
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* (instead of by absolute logfile size)
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* @todo avoid copying the non-truncated tail of the log each time truncation occurs.
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*
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* $Id$
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*
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*/
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#include <stasis/transactional.h>
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BEGIN_C_DECLS
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#ifndef STASIS_TRUNCATION_H
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#define STASIS_TRUNCATION_H
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typedef struct stasis_truncation_t stasis_truncation_t;
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#include <stasis/logger/logger2.h>
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#include <stasis/dirtyPageTable.h>
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stasis_truncation_t * stasis_truncation_init(stasis_dirty_page_table_t * dpt, stasis_log_t * log);
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void stasis_truncation_deinit(stasis_truncation_t * trunc);
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/**
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Spawn a periodic, demand-based log truncation thread.
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*/
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void stasis_truncation_thread_start(stasis_truncation_t* trunc);
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/**
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Initiate a round of log truncation.
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*/
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int stasis_truncation_truncate(stasis_truncation_t* trunc, int force);
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END_C_DECLS
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#endif
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