/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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; version 2 of the License.
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
*/
/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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; version 2 of the License.
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 com.bigdata.io.writecache;
/**
* Interface declaring the counters exposed by the {@link WriteCache}.
*/
public interface IWriteCacheCounters {
/**
* The #of read requests that were satisfied by the cache.
*/
String NHIT = "nhit";
/**
* The #of read requests that were not satisfied by the cache.
*/
String NMISS = "nmiss";
/**
* The effective hit rate for the cache.
*/
String HIT_RATE = "hitRate";
/**
* The #of records that were accepted by the cache.
*/
String NACCEPT = "naccept";
/**
* The #of bytes in the records that were accepted by the cache.
*/
String BYTES_ACCEPTED = "bytesAccepted";
// /**
// * The #of times this write cache was flushed to the backing channel.
// */
// String NFLUSHED = "nflushed";
/**
* The #of writes onto the backing channel - this is either
* {@link WriteCache} buffer instances or individual records in those
* {@link WriteCache} buffers depending on whether the {@link WriteCache}
* supports gathered writes (for the WORM, it is the #of {@link WriteCache}
* instances written, for the RW, it is the #of records written).
*/
String NCHANNEL_WRITE = "nchannelWrite";
/**
* The #of bytes written onto the backing channel.
*/
String BYTES_WRITTEN = "bytesWritten";
/**
* The average bytes per write (will under-report if we must retry writes).
*/
String BYTES_PER_WRITE = "bytesPerWrite";
/**
* The elapsed time (in seconds) writing on the backing channel.
*/
String WRITE_SECS = "writeSecs";
} // interface IWriteCacheCounters