bool Syncdb::init ( ) {
// reset
loopReset();
m_doRcp = false;
m_rcpStarted = false;
// setup quick tree
if ( ! m_qt.set ( 0 , // fixedDataSize
300000 , // 300k nodes
true , // balance?
-1 , // maxmem, no max
false , // ownData?
"tresyncdb" ,
false , // dataInPtrs?
"quicktree" , // dbname
16 , // keySize
false ))// useProtection?
return false;
BigFile f;
f.set ( g_hostdb.m_dir , "quicktree.dat" );
// only load if it exists
bool exists = f.doesExist();
// load it
if ( exists && ! m_qt.fastLoad( &f , &m_stack ) )
return log("sync: quicktree.dat load failed: %s",
mstrerror(g_errno));
// done
f.close();
// assume permanently out of sync
long val = 2;
// load the insync.dat file
f.set ( g_hostdb.m_dir , "insync.dat" );
// fail on open failure
if ( ! f.open ( O_RDONLY ) ) return false;
// if not there, permanently out of sync
if ( ! f.doesExist() )
log("sync: insync.dat does not exist. Assuming host is "
"unrecoverable.");
else {
// get the value
char buf[20];
long n = f.read ( &buf , 10 , 0 ) ;
if ( n <= 0 )
return log("sync: read insync.dat: %s",
mstrerror(g_errno));
// must be digit
if ( ! is_digit ( buf[0] ) )
return log("sync: insync.dat has no number in it.");
// unlink it
if ( ! f.unlink() )
return log("sync: failed to unlink insync.dat: %s",
mstrerror(g_errno));
// get the value
val = atol ( buf );
}
// bad val?
if ( val < 0 || val > 2 )
return log("sync: insync.dat had bad value of %li",val);
// report if in sync or not
if ( val == 0 ) log("sync: insync.dat says out of sync");
if ( val == 1 ) log("sync: insync.dat says in sync");
if ( val == 2 ) log("sync: insync.dat says PERMANENTLY out of sync");
// set it
Host *h = g_hostdb.m_myHost;
if ( val == 1 ) h->m_inSync = 1;
if ( val == 2 ) h->m_isPermanentOutOfSync = 1;
// call this once per second
if ( ! g_loop.registerSleepCallback ( 1000 , NULL , sleepWrapper ) )
return false;
// 10 MB
long maxTreeMem = 10000000;
// . what's max # of tree nodes?
// . key+4+left+right+parents+dataPtr = 12+4 +4+4+4+4 = 32
// . 28 bytes per record when in the tree
long maxTreeNodes = maxTreeMem / ( 16 + 1000 );
// . initialize our own internal rdb
// . records are actual msg4 requests received from Msg4
// . the key is formed calling Syncdb::makeKey() which is based on
// the tid, sid and zid of the msg4 request, where tid is the
// twin hostid we are chatting with in our group, sid is the
// ORIGINAL sending hostid of the msg4 request, and zid is the
// kinda transaction #, and is unique.
if ( ! m_rdb.init ( g_hostdb.m_dir ,
"syncdb" ,
true , // dedup
-1 , // dataSize is variable
50 , // min files to merge
maxTreeMem ,
maxTreeNodes , // maxTreeNodes ,
true , // balance tree?
50000 , // maxCacheMem ,
100 , // maxCacheNodes ,
false , // half keys?
false , // save cache?
NULL , // page cache
false , // is titledb
false , // preload disk page cache
16 , // key size
false , // bias disk page cache?
true ))// is collectionless?
return false;
// add the coll
//if ( ! g_syncdb.m_rdb.addColl ( "dummy" ) ) return true;
// reset quick tree?
if ( ! h->m_isPermanentOutOfSync ) return true;
// clear it all!
m_qt.clear();
// add the base since it is a collectionless rdb
return m_rdb.addRdbBase1 ( NULL );
}
//
// . ENTRY POINT FOR IMPORTING TITLEDB RECS FROM ANOTHER CLUSTER
// . when user clicks 'begin' in import page we come here..
// . so when that parm changes in Parms.cpp we sense that and call
// beginImport(CollectionRec *cr)
// . or on startup we call resumeImports to check each coll for
// an import in progress.
// . search for files named titledb*.dat
// . if none found just return
// . when msg7 inject competes it calls this
// . call this from sleep wrapper in Process.cpp
// . returns false if would block (outstanding injects), true otherwise
// . sets g_errno on error
bool ImportState::importLoop ( ) {
CollectionRec *cr = g_collectiondb.getRec ( m_collnum );
if ( ! cr || g_hostdb.m_hostId != 0 ) {
// if coll was deleted!
log("import: collnum %li deleted while importing into",
(long)m_collnum);
//if ( m_numOut > m_numIn ) return true;
// delete the entire import state i guess
// what happens if we have a msg7 reply come back in?
// it should see the collrec is NULL and just fail.
mdelete ( this, sizeof(ImportState) , "impstate");
delete (this);
return true;
}
INJECTLOOP:
// stop if waiting on outstanding injects
long long out = m_numOut - m_numIn;
if ( out >= cr->m_numImportInjects ) {
g_errno = 0;
return false;
}
if ( ! cr->m_importEnabled ) {
// wait for all to return
if ( out > 0 ) return false;
// then delete it
log("import: collnum %li import loop disabled",
(long)m_collnum);
mdelete ( this, sizeof(ImportState) , "impstate");
delete (this);
return true;
}
// scan each titledb file scanning titledb0001.dat first,
// titledb0003.dat second etc.
//long long offset = -1;
// . when offset is too big for current m_bigFile file then
// we go to the next and set offset to 0.
// . sets m_bf and m_fileOffset
if ( ! setCurrentTitleFileAndOffset ( ) ) {//cr , -1 );
log("import: import: no files to read");
//goto INJECTLOOP;
return true;
}
// this is -1 if none remain!
if ( m_fileOffset == -1 ) {
log("import: import fileoffset is -1. done.");
return true;
}
long long saved = m_fileOffset;
//Msg7 *msg7;
//GigablastRequest *gr;
//SafeBuf *sbuf = NULL;
long need = 12;
long dataSize = -1;
//XmlDoc xd;
key_t tkey;
bool status;
SafeBuf tmp;
SafeBuf *sbuf = &tmp;
long long docId;
long shardNum;
long key;
Multicast *mcast;
char *req;
long reqSize;
if ( m_fileOffset >= m_bfFileSize ) {
log("inject: import: done processing file %li %s",
m_bfFileId,m_bf.getFilename());
goto nextFile;
}
// read in title rec key and data size
status = m_bf.read ( &tkey, sizeof(key_t) , m_fileOffset );
//if ( n != 12 ) goto nextFile;
if ( g_errno ) {
log("inject: import: reading file error: %s. advancing "
"to next file",mstrerror(g_errno));
goto nextFile;
}
m_fileOffset += 12;
// if negative key, skip
if ( (tkey.n0 & 0x01) == 0 ) {
goto INJECTLOOP;
}
// if non-negative then read in size
status = m_bf.read ( &dataSize , 4 , m_fileOffset );
if ( g_errno ) {
log("main: failed to read in title rec "
"file. %s. Skipping file %s",
mstrerror(g_errno),m_bf.getFilename());
goto nextFile;
}
m_fileOffset += 4;
need += 4;
need += dataSize;
need += 4; // collnum, first 4 bytes
if ( dataSize < 0 || dataSize > 500000000 ) {
log("main: could not scan in titledb rec of "
"corrupt dataSize of %li. BAILING ENTIRE "
"SCAN of file %s",dataSize,m_bf.getFilename());
goto nextFile;
}
//gr = &msg7->m_gr;
//XmlDoc *xd = getAvailXmlDoc();
//msg7 = getAvailMsg7();
mcast = getAvailMulticast();
// if none, must have to wait for some to come back to us
if ( ! mcast ) {
// restore file offset
//m_fileOffset = saved;
// no, must have been a oom or something
log("import: import no mcast available");
return true;//false;
}
// this is for holding a compressed titlerec
//sbuf = &mcast->m_sbuf;//&gr->m_sbuf;
// point to start of buf
sbuf->reset();
// ensure we have enough room
sbuf->reserve ( need );
// collnum first 4 bytes
sbuf->pushLong( (long)m_collnum );
// store title key
sbuf->safeMemcpy ( &tkey , sizeof(key_t) );
// then datasize if any. neg rec will have -1 datasize
if ( dataSize >= 0 )
sbuf->pushLong ( dataSize );
// then read data rec itself into it, compressed titlerec part
if ( dataSize > 0 ) {
// read in the titlerec after the key/datasize
status = m_bf.read ( sbuf->getBuf() ,
dataSize ,
m_fileOffset );
if ( g_errno ) { // n != dataSize ) {
log("main: failed to read in title rec "
"file. %s. Skipping file %s",
mstrerror(g_errno),m_bf.getFilename());
// essentially free up this msg7 now
//msg7->m_inUse = false;
//msg7->reset();
goto nextFile;
}
// advance
m_fileOffset += dataSize;
// it's good, count it
sbuf->m_length += dataSize;
}
// set xmldoc from the title rec
//xd->set ( sbuf.getBufStart() );
//xd->m_masterState = NULL;
//xd->m_masterCallback ( titledbInjectLoop );
// we use this so we know where the doc we are injecting
// was in the foregien titledb file. so we can update our bookmark
// code.
mcast->m_hackFileOff = saved;//m_fileOffset;
mcast->m_hackFileId = m_bfFileId;
//
// inject a title rec buf this time, we are doing an import
// FROM A TITLEDB FILE!!!
//
//gr->m_titleRecBuf = &sbuf;
// break it down into gw
// xd.set2 ( sbuf.getBufStart() ,
// sbuf.length() , // max size
// cr->m_coll, // use our coll
// NULL , // pbuf for page parser
// 1 , // niceness
// NULL ); //sreq );
// // note it
// log("import: importing %s",xd.m_firstUrl.getUrl());
// now we can set gr for the injection
// TODO: inject the whole "sbuf" so we get sitenuminlinks etc
// all exactly the same...
// gr->m_url = xd.getFirstUrl()->getUrl();
// gr->m_queryToScrape = NULL;
// gr->m_contentDelim = 0;
// gr->m_contentTypeStr = g_contentTypeStrings [xd.m_contentType];
// gr->m_contentFile = NULL;
// gr->m_content = xd.ptr_utf8Content;
// gr->m_diffbotReply = NULL;
// gr->m_injectLinks = false;
// gr->m_spiderLinks = true;
// gr->m_shortReply = false;
// gr->m_newOnly = false;
// gr->m_deleteUrl = false;
// gr->m_recycle = true; // recycle content? or sitelinks?
// gr->m_dedup = false;
// gr->m_hasMime = false;
// gr->m_doConsistencyTesting = false;
// gr->m_getSections = false;
// gr->m_gotSections = false;
// gr->m_charset = xd.m_charset;
// gr->m_hopCount = xd.m_hopCount;
//
// point to next doc in the titledb file
//
//m_fileOffset += need;
// get docid from key
docId = g_titledb.getDocIdFromKey ( &tkey );
// get shard that holds the titlerec for it
shardNum = g_hostdb.getShardNumFromDocId ( docId );
// for selecting which host in the shard receives it
key = (long)docId;
m_numOut++;
// then index it. master callback will be called
//if ( ! xd->index() ) return false;
// TODO: make this forward the request to an appropriate host!!
// . gr->m_sbuf is set to the titlerec so this should handle that
// and use XmlDoc::set4() or whatever
// if ( msg7->injectTitleRec ( msg7 , // state
// gotMsg7ReplyWrapper , // callback
// cr )) {
// // it didn't block somehow...
// msg7->m_inUse = false;
// msg7->gotMsg7Reply();
// }
req = sbuf->getBufStart();
reqSize = sbuf->length();
if ( reqSize != need ) { char *xx=NULL;*xx=0 ; }
// do not free it, let multicast free it after sending it
sbuf->detachBuf();
if ( ! mcast->send ( req ,
reqSize ,
0x07 ,
true , // ownmsg?
shardNum,
false, // send to whole shard?
key , // for selecting host in shard
mcast , // state
NULL , // state2
gotMulticastReplyWrapper ,
999999 ) ) { // total timeout in seconds
log("import: import mcast had error: %s",mstrerror(g_errno));
m_numIn++;
}
goto INJECTLOOP;
nextFile:
// invalidate this flag
//m_offIsValid = false;
// . and call this function. we add one to m_bfFileId so we
// do not re-get the file we just injected.
// . sets m_bf and m_fileOffset
// . returns false if nothing to read
if ( ! setCurrentTitleFileAndOffset ( ) ) { //cr , m_bfFileId+1 );
log("import: import: no files left to read");
//goto INJECTLOOP;
return true;
}
// if it returns NULL we are done!
log("main: titledb injection loop completed. waiting for "
"outstanding injects to return.");
if ( m_numOut > m_numIn )
return false;
log("main: all injects have returned. DONE.");
// dummy return
return true;
}