boxtec
/
yacy_search_server
mirror of https://github.com/yacy/yacy_search_server
4
1
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'fc27bf8c4c'
${ noResults }
yacy_search_server/source/de/anomic/plasma/plasmaRankingCRProcess.java

538 lines
28 KiB
Raw Blame History

// plasmaCRProcess.java
// -----------------------
// part of YaCy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2005
// Created 15.11.2005
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package de.anomic.plasma;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import de.anomic.kelondro.kelondroAttrSeq;
import de.anomic.kelondro.kelondroBase64Order;
import de.anomic.kelondro.kelondroBitfield;
import de.anomic.kelondro.kelondroCollectionIndex;
import de.anomic.kelondro.kelondroEcoTable;
import de.anomic.kelondro.kelondroIndex;
import de.anomic.kelondro.kelondroMicroDate;
import de.anomic.kelondro.kelondroRow;
import de.anomic.kelondro.kelondroRowSet;
import de.anomic.kelondro.kelondroDate;
import de.anomic.kelondro.kelondroMemory;
import de.anomic.server.serverFileUtils;
public class plasmaRankingCRProcess {
/*
header.append("# Name=YaCy " + ((type.equals("crl")) ? "Local" : "Global") + " Citation Reference Ticket"); header.append((char) 13); header.append((char) 10);
header.append("# Created=" + System.currentTimeMillis()); header.append((char) 13); header.append((char) 10);
header.append("# Structure=<Referee-12>,'=',<UDate-3>,<VDate-3>,<LCount-2>,<GCount-2>,<ICount-2>,<DCount-2>,<TLength-3>,<WACount-3>,<WUCount-3>,<Flags-1>,'|',*<Anchor-" + ((type.equals("crl")) ? "6" : "12") + ">"); header.append((char) 13); header.append((char) 10);
header.append("# ---"); header.append((char) 13); header.append((char) 10);
*/
public static final kelondroRow CRG_accrow = new kelondroRow(
"byte[] Referee-12," +
"Cardinal UDate-3 {b64e}, Cardinal VDate-3 {b64e}, " +
"Cardinal LCount-2 {b64e}, Cardinal GCount-2 {b64e}, Cardinal ICount-2 {b64e}, Cardinal DCount-2 {b64e}, Cardinal TLength-3 {b64e}, " +
"Cardinal WACount-3 {b64e}, Cardinal WUCount-3 {b64e}, Cardinal Flags-1 {b64e}, " +
"Cardinal FUDate-3 {b64e}, Cardinal FDDate-3 {b64e}, Cardinal LUDate-3 {b64e}, " +
"Cardinal UCount-2 {b64e}, Cardinal PCount-2 {b64e}, Cardinal ACount-2 {b64e}, Cardinal VCount-2 {b64e}, Cardinal Vita-2 {b64e}",
kelondroBase64Order.enhancedCoder, 0);
public static final kelondroRow CRG_colrow = new kelondroRow("byte[] Anchor-12", kelondroBase64Order.enhancedCoder, 0);
public static final String CRG_accname = "CRG-a-attr";
public static final String CRG_seqname = "CRG-a-coli";
public static final kelondroRow RCI_coli = new kelondroRow("byte[] RefereeDom-6", kelondroBase64Order.enhancedCoder, 0);
public static final String RCI_colname = "RCI-a-coli";
private static boolean accumulate_upd(final File f, final kelondroAttrSeq acc) {
// open file
kelondroAttrSeq source_cr = null;
try {
source_cr = new kelondroAttrSeq(f, false);
} catch (final IOException e) {
return false;
}
// put elements in accumulator file
final Iterator<String> el = source_cr.keys();
String key;
kelondroAttrSeq.Entry new_entry, acc_entry;
int FUDate, FDDate, LUDate, UCount, PCount, ACount, VCount, Vita;
kelondroBitfield acc_flags, new_flags;
while (el.hasNext()) {
key = el.next();
new_entry = source_cr.getEntry(key);
new_flags = new kelondroBitfield(kelondroBase64Order.enhancedCoder.encodeLong(new_entry.getAttr("Flags", 0), 1).getBytes());
// enrich information with additional values
if ((acc_entry = acc.getEntry(key)) != null) {
FUDate = (int) acc_entry.getAttr("FUDate", 0);
FDDate = (int) acc_entry.getAttr("FDDate", 0);
LUDate = (int) acc_entry.getAttr("LUDate", 0);
UCount = (int) acc_entry.getAttr("UCount", 0);
PCount = (int) acc_entry.getAttr("PCount", 0);
ACount = (int) acc_entry.getAttr("ACount", 0);
VCount = (int) acc_entry.getAttr("VCount", 0);
Vita = (int) acc_entry.getAttr("Vita", 0);
// update counters and dates
acc_entry.setSeq(new_entry.getSeqSet()); // need to be checked
UCount++; // increase update counter
PCount += (new_flags.get(1)) ? 1 : 0;
ACount += (new_flags.get(2)) ? 1 : 0;
VCount += (new_flags.get(3)) ? 1 : 0;
// 'OR' the flags
acc_flags = new kelondroBitfield(kelondroBase64Order.enhancedCoder.encodeLong(acc_entry.getAttr("Flags", 0), 1).getBytes());
for (int i = 0; i < 6; i++) {
if (new_flags.get(i)) acc_flags.set(i, true);
}
acc_entry.setAttr("Flags", (int) kelondroBase64Order.enhancedCoder.decodeLong(acc_flags.exportB64()));
} else {
// initialize counters and dates
acc_entry = acc.newEntry(key, new_entry.getAttrs(), new_entry.getSeqSet());
FUDate = kelondroMicroDate.microDateHoursInt(System.currentTimeMillis()); // first update date
FDDate = kelondroMicroDate.microDateHoursInt(System.currentTimeMillis()); // very difficult to compute; this is only a quick-hack
LUDate = (int) new_entry.getAttr("VDate", 0);
UCount = 0;
PCount = (new_flags.get(1)) ? 1 : 0;
ACount = (new_flags.get(2)) ? 1 : 0;
VCount = (new_flags.get(3)) ? 1 : 0;
Vita = 0;
}
// make plausibility check?
// insert into accumulator
acc_entry.setAttr("FUDate", FUDate);
acc_entry.setAttr("FDDate", FDDate);
acc_entry.setAttr("LUDate", LUDate);
acc_entry.setAttr("UCount", UCount);
acc_entry.setAttr("PCount", PCount);
acc_entry.setAttr("ACount", ACount);
acc_entry.setAttr("VCount", VCount);
acc_entry.setAttr("Vita", Vita);
acc.putEntrySmall(acc_entry);
}
return true;
}
private static boolean accumulate_upd(final File f, final kelondroIndex acc, final kelondroCollectionIndex seq) throws IOException {
// open file
kelondroAttrSeq source_cr = null;
try {
source_cr = new kelondroAttrSeq(f, false);
} catch (final IOException e) {
return false;
}
// put elements in accumulator file
final Iterator<String> el = source_cr.keys();
String key;
kelondroAttrSeq.Entry new_entry;
kelondroRow.Entry acc_entry;
int FUDate, FDDate, LUDate, UCount, PCount, ACount, VCount, Vita;
kelondroBitfield acc_flags, new_flags;
while (el.hasNext()) {
key = el.next();
new_entry = source_cr.getEntry(key);
new_flags = new kelondroBitfield(kelondroBase64Order.enhancedCoder.encodeLong(new_entry.getAttr("Flags", 0), 1).getBytes());
// enrich information with additional values
if ((acc_entry = acc.get(key.getBytes())) != null) {
FUDate = (int) acc_entry.getColLong("FUDate", 0);
FDDate = (int) acc_entry.getColLong("FDDate", 0);
LUDate = (int) acc_entry.getColLong("LUDate", 0);
UCount = (int) acc_entry.getColLong("UCount", 0);
PCount = (int) acc_entry.getColLong("PCount", 0);
ACount = (int) acc_entry.getColLong("ACount", 0);
VCount = (int) acc_entry.getColLong("VCount", 0);
Vita = (int) acc_entry.getColLong("Vita", 0);
// update counters and dates
seq.put(key.getBytes(), new_entry.getSeqCollection()); // FIXME: old and new collection must be joined
UCount++; // increase update counter
PCount += (new_flags.get(1)) ? 1 : 0;
ACount += (new_flags.get(2)) ? 1 : 0;
VCount += (new_flags.get(3)) ? 1 : 0;
// 'OR' the flags
acc_flags = new kelondroBitfield(kelondroBase64Order.enhancedCoder.encodeLong(acc_entry.getColLong("Flags", 0), 1).getBytes());
for (int i = 0; i < 6; i++) {
if (new_flags.get(i)) acc_flags.set(i, true);
}
acc_entry.setCol("Flags", (int) kelondroBase64Order.enhancedCoder.decodeLong(acc_flags.exportB64()));
} else {
// initialize counters and dates
acc_entry = acc.row().newEntry();
acc_entry.setCol("Referee", key, null);
for (int i = 1; i < acc.row().columns(); i++) {
acc_entry.setCol(i, new_entry.getAttr(acc.row().column(i).nickname, 0));
}
seq.put(key.getBytes(), new_entry.getSeqCollection());
FUDate = kelondroMicroDate.microDateHoursInt(System.currentTimeMillis()); // first update date
FDDate = kelondroMicroDate.microDateHoursInt(System.currentTimeMillis()); // very difficult to compute; this is only a quick-hack
LUDate = (int) new_entry.getAttr("VDate", 0);
UCount = 0;
PCount = (new_flags.get(1)) ? 1 : 0;
ACount = (new_flags.get(2)) ? 1 : 0;
VCount = (new_flags.get(3)) ? 1 : 0;
Vita = 0;
}
// make plausibility check?
// insert into accumulator
acc_entry.setCol("FUDate", FUDate);
acc_entry.setCol("FDDate", FDDate);
acc_entry.setCol("LUDate", LUDate);
acc_entry.setCol("UCount", UCount);
acc_entry.setCol("PCount", PCount);
acc_entry.setCol("ACount", ACount);
acc_entry.setCol("VCount", VCount);
acc_entry.setCol("Vita", Vita);
acc.put(acc_entry);
}
return true;
}
public static void accumulate(final File from_dir, final File tmp_dir, final File err_dir, final File bkp_dir, final File to_file, int max_files, final boolean newdb) throws IOException {
if (!(from_dir.isDirectory())) {
System.out.println("source path " + from_dir + " is not a directory.");
return;
}
if (!(tmp_dir.isDirectory())) {
System.out.println("temporary path " + tmp_dir + " is not a directory.");
return;
}
if (!(err_dir.isDirectory())) {
System.out.println("error path " + err_dir + " is not a directory.");
return;
}
if (!(bkp_dir.isDirectory())) {
System.out.println("back-up path " + bkp_dir + " is not a directory.");
return;
}
// open target file
kelondroAttrSeq acc = null;
kelondroIndex newacc = null;
kelondroCollectionIndex newseq = null;
if (newdb) {
final File path = to_file.getParentFile(); // path to storage place
newacc = new kelondroEcoTable(new File(path, CRG_accname), CRG_accrow, kelondroEcoTable.tailCacheUsageAuto, 0, 0);
newseq = new kelondroCollectionIndex(path, CRG_seqname, 12, kelondroBase64Order.enhancedCoder, 2, 9, CRG_colrow, false);
} else {
if (!(to_file.exists())) {
acc = new kelondroAttrSeq("Global Ranking Accumulator File",
"<Referee-12>,'='," +
"<UDate-3>,<VDate-3>,<LCount-2>,<GCount-2>,<ICount-2>,<DCount-2>,<TLength-3>,<WACount-3>,<WUCount-3>,<Flags-1>," +
"<FUDate-3>,<FDDate-3>,<LUDate-3>,<UCount-2>,<PCount-2>,<ACount-2>,<VCount-2>,<Vita-2>," +
"'|',*<Anchor-12>", false);
acc.toFile(to_file);
}
acc = new kelondroAttrSeq(to_file, false);
}
// collect source files
File source_file = null;
final String[] files = from_dir.list();
if (files.length < max_files) max_files = files.length;
for (int i = 0; i < max_files; i++) {
// open file
source_file = new File(from_dir, files[i]);
if (newdb) {
if (accumulate_upd(source_file, newacc, newseq)) {
// move CR file to temporary folder
source_file.renameTo(new File(tmp_dir, files[i]));
} else {
// error case: the CR-file is not valid; move to error path
source_file.renameTo(new File(err_dir, files[i]));
}
} else {
if (accumulate_upd(source_file, acc)) {
// move CR file to temporary folder
source_file.renameTo(new File(tmp_dir, files[i]));
} else {
// error case: the CR-file is not valid; move to error path
source_file.renameTo(new File(err_dir, files[i]));
}
}
}
try {
if (newdb) {
newacc.close();
newseq.close();
} else {
// save accumulator to temporary file
File tmp_file;
if (to_file.toString().endsWith(".gz")) {
tmp_file = new File(to_file.toString() + "." + (System.currentTimeMillis() % 1000) + ".tmp.gz");
} else {
tmp_file = new File(to_file.toString() + "." + (System.currentTimeMillis() % 1000) + ".tmp");
}
// store the file
acc.toFile(tmp_file);
// since this was successful, we remove the old file and move the new file to it
to_file.delete();
tmp_file.renameTo(to_file);
}
serverFileUtils.moveAll(tmp_dir, bkp_dir);
} catch (final IOException e) {
// move previously processed files back
e.printStackTrace();
serverFileUtils.moveAll(tmp_dir, from_dir);
}
}
public static int genrci(File cr_in, final File rci_out) throws IOException {
if (!(cr_in.exists())) return 0;
kelondroAttrSeq cr = new kelondroAttrSeq(cr_in, false);
//if (rci_out.exists()) rci_out.delete(); // we want only fresh rci here (during testing)
if (!(rci_out.exists())) {
final kelondroAttrSeq rcix = new kelondroAttrSeq("Global Ranking Reverse Citation Index",
"<AnchorDom-6>,'='," +
"<UDate-3>," +
"'|',*<Referee-12>", false);
rcix.toFile(rci_out);
}
final kelondroAttrSeq rci = new kelondroAttrSeq(rci_out, false);
// loop over all referees
int count = 0;
final int size = cr.size();
final long start = System.currentTimeMillis();
long l;
final Iterator<String> i = cr.keys();
String referee, anchor, anchorDom;
kelondroAttrSeq.Entry cr_entry, rci_entry;
long cr_UDate, rci_UDate;
while (i.hasNext()) {
referee = i.next();
cr_entry = cr.getEntry(referee);
cr_UDate = cr_entry.getAttr("UDate", 0);
// loop over all anchors
final Iterator<String> j = cr_entry.getSeqSet().iterator();
while (j.hasNext()) {
// get domain of anchors
anchor = j.next();
if (anchor.length() == 6) anchorDom = anchor; else anchorDom = anchor.substring(6);
// update domain-specific entry
rci_entry = rci.getEntry(anchorDom);
if (rci_entry == null) rci_entry = rci.newEntry(anchorDom, false);
rci_entry.addSeq(referee);
// update Update-Date
rci_UDate = rci_entry.getAttr("UDate", 0);
if (cr_UDate > rci_UDate) rci_entry.setAttr("UDate", cr_UDate);
// insert entry
rci.putEntry(rci_entry);
}
count++;
if ((count % 1000) == 0) {
l = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("processed " + count + " citations, " + (count / l) + " per second, rci.size = " + rci.size() + ", " + ((size - count) / (count / l)) + " seconds remaining; mem = " + kelondroMemory.available());
}
i.remove();
}
// finished. write to file
cr = null;
cr_in = null;
kelondroMemory.gc(1000, "plasmaRankingCRProcess.genrci(...)"); // thq
rci.toFile(rci_out);
return count;
}
public static int genrcix(final File cr_path_in, final File rci_path_out) throws IOException {
//kelondroFlexTable acc = new kelondroFlexTable(cr_path_in, CRG_accname, kelondroBase64Order.enhancedCoder, 128 * 1024 * 1024, -1, CRG_accrow, true);
final kelondroCollectionIndex seq = new kelondroCollectionIndex(cr_path_in, CRG_seqname, 12, kelondroBase64Order.enhancedCoder, 2, 9, CRG_colrow, false);
final kelondroCollectionIndex rci = new kelondroCollectionIndex(rci_path_out, RCI_colname, 6, kelondroBase64Order.enhancedCoder, 2, 9, RCI_coli, false);
// loop over all referees
int count = 0;
final int size = seq.size();
final long start = System.currentTimeMillis();
long l;
final Iterator<Object[]> i = seq.keycollections(null, null, false);
Object[] keycollection;
String referee, refereeDom, anchor, anchorDom;
kelondroRowSet cr_entry, rci_entry;
while (i.hasNext()) {
keycollection = i.next();
referee = new String((byte[]) keycollection[0]);
if (referee.length() == 6) refereeDom = referee; else refereeDom = referee.substring(6);
cr_entry = (kelondroRowSet) keycollection[1];
// loop over all anchors
for (kelondroRow.Entry entry: cr_entry) {
anchor = entry.getColString(0, null);
if (anchor.length() == 6) anchorDom = anchor; else anchorDom = anchor.substring(6);
// update domain-specific entry
rci_entry = rci.get(anchorDom.getBytes());
if (rci_entry == null) rci_entry = new kelondroRowSet(RCI_coli, 0);
rci_entry.add(refereeDom.getBytes());
// insert entry
rci.put(anchorDom.getBytes(), rci_entry);
}
count++;
if ((count % 1000) == 0) {
l = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("processed " + count + " citations, " + (count / l) + " per second, rci.size = " + rci.size() + ", " + ((size - count) / (count / l) / 60) + " minutes remaining; mem = " + kelondroMemory.free());
}
}
// finished. write to file
seq.close();
rci.close();
return count;
}
public static void main(final String[] args) {
// java -classpath source de.anomic.plasma.kelondroPropFile -transcode DATA/RANKING/GLOBAL/CRG-test-unsorted-original.cr DATA/RANKING/GLOBAL/CRG-test-generated.cr
try {
if ((args.length == 5) && (args[0].equals("-accumulate"))) {
accumulate(new File(args[1]), new File(args[2]), new File(args[3]), new File(args[4]), new File(args[5]), Integer.parseInt(args[6]), true);
}
if ((args.length == 2) && (args[0].equals("-accumulate"))) {
final File root_path = new File(args[1]);
final File from_dir = new File(root_path, "DATA/RANKING/GLOBAL/014_othercr");
final File ready_dir = new File(root_path, "DATA/RANKING/GLOBAL/015_ready");
final File tmp_dir = new File(root_path, "DATA/RANKING/GLOBAL/016_tmp");
final File err_dir = new File(root_path, "DATA/RANKING/GLOBAL/017_err");
final File acc_dir = new File(root_path, "DATA/RANKING/GLOBAL/018_acc");
final String filename = "CRG-a-" + new kelondroDate().toShortString(true) + ".cr.gz";
final File to_file = new File(root_path, "DATA/RANKING/GLOBAL/020_con0/" + filename);
if (!(ready_dir.exists())) ready_dir.mkdirs();
if (!(tmp_dir.exists())) tmp_dir.mkdirs();
if (!(err_dir.exists())) err_dir.mkdirs();
if (!(acc_dir.exists())) acc_dir.mkdirs();
if (!(to_file.getParentFile().exists())) to_file.getParentFile().mkdirs();
serverFileUtils.moveAll(from_dir, ready_dir);
final long start = System.currentTimeMillis();
final int files = ready_dir.list().length;
accumulate(ready_dir, tmp_dir, err_dir, acc_dir, to_file, 1000, true);
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("Finished accumulate for " + files + " files in " + seconds + " seconds (" + (files / seconds) + " files/second)");
}
if ((args.length == 3) && (args[0].equals("-recycle"))) {
final File root_path = new File(args[1]);
final int max_age_hours = Integer.parseInt(args[2]);
final File own_dir = new File(root_path, "DATA/RANKING/GLOBAL/010_owncr");
final File acc_dir = new File(root_path, "DATA/RANKING/GLOBAL/018_acc");
final File bkp_dir = new File(root_path, "DATA/RANKING/GLOBAL/019_bkp");
if (!(own_dir.exists())) return;
if (!(acc_dir.exists())) return;
if (!(bkp_dir.exists())) bkp_dir.mkdirs();
final String[] list = acc_dir.list();
final long start = System.currentTimeMillis();
final int files = list.length;
long d;
File f;
for (int i = 0; i < list.length; i++) {
f = new File(acc_dir, list[i]);
try {
d = (System.currentTimeMillis() - (new kelondroAttrSeq(f, false)).created()) / 3600000;
if (d > max_age_hours) {
// file is considered to be too old, it is not recycled
System.out.println("file " + f.getName() + " is old (" + d + " hours) and not recycled, only moved to backup");
f.renameTo(new File(bkp_dir, list[i]));
} else {
// file is fresh, it is duplicated and moved to be transferred to other peers again
System.out.println("file " + f.getName() + " is fresh (" + d + " hours old), recycled and moved to backup");
serverFileUtils.copy(f, new File(own_dir, list[i]));
f.renameTo(new File(bkp_dir, list[i]));
}
} catch (final IOException e) {
// there is something wrong with this file; delete it
System.out.println("file " + f.getName() + " is corrupted and deleted");
f.delete();
}
}
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("Finished recycling of " + files + " files in " + seconds + " seconds (" + (files / seconds) + " files/second)");
}
if ((args.length == 2) && (args[0].equals("-genrci"))) {
final File root_path = new File(args[1]);
final File cr_filedir = new File(root_path, "DATA/RANKING/GLOBAL/020_con0");
final File rci_filedir = new File(root_path, "DATA/RANKING/GLOBAL/030_rci0");
rci_filedir.mkdirs();
final long start = System.currentTimeMillis();
final int count = genrcix(cr_filedir, rci_filedir);
final long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("Completed RCI generation: " + count + " citation references in " + seconds + " seconds (" + (count / seconds) + " CR-records/second)");
}
/*
if ((args.length == 2) && (args[0].equals("-genrci"))) {
File root_path = new File(args[1]);
File cr_filedir = new File(root_path, "DATA/RANKING/GLOBAL/020_con0");
File rci_file = new File(root_path, "DATA/RANKING/GLOBAL/030_rci0/RCI-0.rci.gz");
rci_file.getParentFile().mkdirs();
String[] cr_filenames = cr_filedir.list();
for (int i = 0; i < cr_filenames.length; i++) {
long start = System.currentTimeMillis();
int count = genrci(new File(cr_filedir, cr_filenames[i]), rci_file);
long seconds = java.lang.Math.max(1, (System.currentTimeMillis() - start) / 1000);
System.out.println("Completed RCI generation for input file " + cr_filenames[i] + ": " + count + " citation references in " + seconds + " seconds (" + (count / seconds) + " CR-records/second)");
}
}
*/
} catch (final IOException e) {
e.printStackTrace();
}
}
/*
Class-A File format:
UDate : latest update timestamp of the URL (as virtual date, hours since epoch)
VDate : last visit timestamp of the URL (as virtual date, hours since epoch)
LCount : count of links to local resources
GCount : count of links to global resources
ICount : count of links to images (in document)
DCount : count of links to other documents
TLength: length of the plain text content (bytes)
WACount: total number of all words in content
WUCount: number of unique words in content (removed doubles)
Flags : Flags (0=update, 1=popularity, 2=attention, 3=vote)
Class-a File format is an extension of Class-A plus the following attributes
FUDate : first update timestamp of the URL
FDDate : first update timestamp of the domain
LUDate : latest update timestamp of the URL
UCount : Update Counter (of 'latest update timestamp')
PCount : Popularity Counter (proxy clicks)
ACount : Attention Counter (search result clicks)
VCount : Votes
Vita : Vitality (normed number of updates per time)
*/
}
Reference in new issue View Git Blame Copy Permalink