88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/* @file compact.cpp
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compaction of deleted space in pdfiles (datafiles)
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*/
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/* NOTE 6Oct2010 : this file PRELIMINARY, EXPERIMENTAL, NOT DONE, NOT USED YET (not in SConstruct) */
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/**
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* Copyright (C) 2010 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,b
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "pch.h"
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#include "pdfile.h"
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#include "concurrency.h"
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namespace mongo {
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class CompactJob {
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public:
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CompactJob(string ns) : _ns(ns) { }
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void go();
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private:
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void clean(Extent *e);
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void phase1();
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const string _ns;
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};
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void CompactJob::clean(Extent *e) {
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//avoid = e->myLoc;
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while( 1 ) {
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Record *r = e->getRecord( e->firstRecord );
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theDataFileMgr.deleteRecord(_ns.c_str(), r, e->firstRecord);
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///....
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}
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}
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void CompactJob::phase1() {
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writelock lk;
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//readlock lk;
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NamespaceDetails *nsd = nsdetails(_ns.c_str());
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if( nsd == 0 ) throw "ns gone";
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if( nsd->capped ) throw "capped compact not supported nor usually necessary";
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DiskLoc L = nsd->firstExtent;
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if( L.isNull() ) throw "nothing to do";
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Extent *e = L.ext();
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assert( e );
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Extent *ne = e->getNextExtent();
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if( ne == 0 ) throw "only 1 extent";
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clean(e);
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}
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void CompactJob::go() {
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phase1();
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}
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void compactThread() {
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Client::initThread("compact");
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try {
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CompactJob compact("test.foo");
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compact.go();
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}
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catch(const char *p) {
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DEV log() << "info: exception compact " << p << endl;
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}
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catch(...) {
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DEV log() << "info: exception compact" << endl;
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}
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}
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}
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