void stopAppendOnly(void) {
redisAssert(server.aof_state != REDIS_AOF_OFF);
flushAppendOnlyFile(1);
- aof_fsync(server.appendfd);
- close(server.appendfd);
+ aof_fsync(server.aof_fd);
+ close(server.aof_fd);
- server.appendfd = -1;
- server.appendseldb = -1;
+ server.aof_fd = -1;
+ server.aof_selected_db = -1;
server.aof_state = REDIS_AOF_OFF;
/* rewrite operation in progress? kill it, wait child exit */
- if (server.bgrewritechildpid != -1) {
+ if (server.aof_child_pid != -1) {
int statloc;
- if (kill(server.bgrewritechildpid,SIGKILL) != -1)
+ redisLog(REDIS_NOTICE,"Killing running AOF rewrite child: %ld",
+ (long) server.aof_child_pid);
+ if (kill(server.aof_child_pid,SIGKILL) != -1)
wait3(&statloc,0,NULL);
/* reset the buffer accumulating changes while the child saves */
- sdsfree(server.bgrewritebuf);
- server.bgrewritebuf = sdsempty();
- aofRemoveTempFile(server.bgrewritechildpid);
- server.bgrewritechildpid = -1;
+ sdsfree(server.aof_rewrite_buf);
+ server.aof_rewrite_buf = sdsempty();
+ aofRemoveTempFile(server.aof_child_pid);
+ server.aof_child_pid = -1;
}
}
/* Called when the user switches from "appendonly no" to "appendonly yes"
* at runtime using the CONFIG command. */
int startAppendOnly(void) {
- server.lastfsync = time(NULL);
- server.appendfd = open(server.aof_filename,O_WRONLY|O_APPEND|O_CREAT,0644);
+ server.aof_last_fsync = server.unixtime;
+ server.aof_fd = open(server.aof_filename,O_WRONLY|O_APPEND|O_CREAT,0644);
redisAssert(server.aof_state == REDIS_AOF_OFF);
- if (server.appendfd == -1) {
+ if (server.aof_fd == -1) {
redisLog(REDIS_WARNING,"Redis needs to enable the AOF but can't open the append only file: %s",strerror(errno));
return REDIS_ERR;
}
if (rewriteAppendOnlyFileBackground() == REDIS_ERR) {
- close(server.appendfd);
+ close(server.aof_fd);
redisLog(REDIS_WARNING,"Redis needs to enable the AOF but can't trigger a background AOF rewrite operation. Check the above logs for more info about the error.");
return REDIS_ERR;
}
ssize_t nwritten;
int sync_in_progress = 0;
- if (sdslen(server.aofbuf) == 0) return;
+ if (sdslen(server.aof_buf) == 0) return;
if (server.aof_fsync == AOF_FSYNC_EVERYSEC)
sync_in_progress = bioPendingJobsOfType(REDIS_BIO_AOF_FSYNC) != 0;
}
/* Otherwise fall trough, and go write since we can't wait
* over two seconds. */
+ server.aof_delayed_fsync++;
redisLog(REDIS_NOTICE,"Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.");
}
}
* While this will save us against the server being killed I don't think
* there is much to do about the whole server stopping for power problems
* or alike */
- nwritten = write(server.appendfd,server.aofbuf,sdslen(server.aofbuf));
- if (nwritten != (signed)sdslen(server.aofbuf)) {
+ nwritten = write(server.aof_fd,server.aof_buf,sdslen(server.aof_buf));
+ if (nwritten != (signed)sdslen(server.aof_buf)) {
/* Ooops, we are in troubles. The best thing to do for now is
* aborting instead of giving the illusion that everything is
* working as expected. */
if (nwritten == -1) {
redisLog(REDIS_WARNING,"Exiting on error writing to the append-only file: %s",strerror(errno));
} else {
- redisLog(REDIS_WARNING,"Exiting on short write while writing to the append-only file: %s",strerror(errno));
+ redisLog(REDIS_WARNING,"Exiting on short write while writing to "
+ "the append-only file: %s (nwritten=%ld, "
+ "expected=%ld)",
+ strerror(errno),
+ (long)nwritten,
+ (long)sdslen(server.aof_buf));
}
exit(1);
}
/* Re-use AOF buffer when it is small enough. The maximum comes from the
* arena size of 4k minus some overhead (but is otherwise arbitrary). */
- if ((sdslen(server.aofbuf)+sdsavail(server.aofbuf)) < 4000) {
- sdsclear(server.aofbuf);
+ if ((sdslen(server.aof_buf)+sdsavail(server.aof_buf)) < 4000) {
+ sdsclear(server.aof_buf);
} else {
- sdsfree(server.aofbuf);
- server.aofbuf = sdsempty();
+ sdsfree(server.aof_buf);
+ server.aof_buf = sdsempty();
}
/* Don't fsync if no-appendfsync-on-rewrite is set to yes and there are
* children doing I/O in the background. */
if (server.aof_no_fsync_on_rewrite &&
- (server.bgrewritechildpid != -1 || server.bgsavechildpid != -1))
+ (server.aof_child_pid != -1 || server.rdb_child_pid != -1))
return;
/* Perform the fsync if needed. */
if (server.aof_fsync == AOF_FSYNC_ALWAYS) {
/* aof_fsync is defined as fdatasync() for Linux in order to avoid
* flushing metadata. */
- aof_fsync(server.appendfd); /* Let's try to get this data on the disk */
- server.lastfsync = server.unixtime;
+ aof_fsync(server.aof_fd); /* Let's try to get this data on the disk */
+ server.aof_last_fsync = server.unixtime;
} else if ((server.aof_fsync == AOF_FSYNC_EVERYSEC &&
- server.unixtime > server.lastfsync)) {
- if (!sync_in_progress) aof_background_fsync(server.appendfd);
- server.lastfsync = server.unixtime;
+ server.unixtime > server.aof_last_fsync)) {
+ if (!sync_in_progress) aof_background_fsync(server.aof_fd);
+ server.aof_last_fsync = server.unixtime;
}
}
/* The DB this command was targetting is not the same as the last command
* we appendend. To issue a SELECT command is needed. */
- if (dictid != server.appendseldb) {
+ if (dictid != server.aof_selected_db) {
char seldb[64];
snprintf(seldb,sizeof(seldb),"%d",dictid);
buf = sdscatprintf(buf,"*2\r\n$6\r\nSELECT\r\n$%lu\r\n%s\r\n",
(unsigned long)strlen(seldb),seldb);
- server.appendseldb = dictid;
+ server.aof_selected_db = dictid;
}
if (cmd->proc == expireCommand || cmd->proc == pexpireCommand ||
* of re-entering the event loop, so before the client will get a
* positive reply about the operation performed. */
if (server.aof_state == REDIS_AOF_ON)
- server.aofbuf = sdscatlen(server.aofbuf,buf,sdslen(buf));
+ server.aof_buf = sdscatlen(server.aof_buf,buf,sdslen(buf));
/* If a background append only file rewriting is in progress we want to
* accumulate the differences between the child DB and the current one
* in a buffer, so that when the child process will do its work we
* can append the differences to the new append only file. */
- if (server.bgrewritechildpid != -1)
- server.bgrewritebuf = sdscatlen(server.bgrewritebuf,buf,sdslen(buf));
+ if (server.aof_child_pid != -1)
+ server.aof_rewrite_buf = sdscatlen(server.aof_rewrite_buf,buf,sdslen(buf));
sdsfree(buf);
}
selectDb(c,0);
c->fd = -1;
c->querybuf = sdsempty();
+ c->querybuf_peak = 0;
c->argc = 0;
c->argv = NULL;
c->bufpos = 0;
* so that Redis will not try to send replies to this client. */
c->replstate = REDIS_REPL_WAIT_BGSAVE_START;
c->reply = listCreate();
+ c->reply_bytes = 0;
+ c->obuf_soft_limit_reached_time = 0;
c->watched_keys = listCreate();
listSetFreeMethod(c->reply,decrRefCount);
listSetDupMethod(c->reply,dupClientReplyValue);
return 1;
}
+/* Write either the key or the value of the currently selected item of an hash.
+ * The 'hi' argument passes a valid Redis hash iterator.
+ * The 'what' filed specifies if to write a key or a value and can be
+ * either REDIS_HASH_KEY or REDIS_HASH_VALUE.
+ *
+ * The function returns 0 on error, non-zero on success. */
+static int rioWriteHashIteratorCursor(rio *r, hashTypeIterator *hi, int what) {
+ if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
+ unsigned char *vstr = NULL;
+ unsigned int vlen = UINT_MAX;
+ long long vll = LLONG_MAX;
+
+ hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
+ if (vstr) {
+ return rioWriteBulkString(r, (char*)vstr, vlen);
+ } else {
+ return rioWriteBulkLongLong(r, vll);
+ }
+
+ } else if (hi->encoding == REDIS_ENCODING_HT) {
+ robj *value;
+
+ hashTypeCurrentFromHashTable(hi, what, &value);
+ return rioWriteBulkObject(r, value);
+ }
+
+ redisPanic("Unknown hash encoding");
+ return 0;
+}
+
/* Emit the commands needed to rebuild a hash object.
* The function returns 0 on error, 1 on success. */
int rewriteHashObject(rio *r, robj *key, robj *o) {
+ hashTypeIterator *hi;
long long count = 0, items = hashTypeLength(o);
- if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *p = zipmapRewind(o->ptr);
- unsigned char *field, *val;
- unsigned int flen, vlen;
+ hi = hashTypeInitIterator(o);
+ while (hashTypeNext(hi) != REDIS_ERR) {
+ if (count == 0) {
+ int cmd_items = (items > REDIS_AOF_REWRITE_ITEMS_PER_CMD) ?
+ REDIS_AOF_REWRITE_ITEMS_PER_CMD : items;
- while((p = zipmapNext(p,&field,&flen,&val,&vlen)) != NULL) {
- if (count == 0) {
- int cmd_items = (items > REDIS_AOF_REWRITE_ITEMS_PER_CMD) ?
- REDIS_AOF_REWRITE_ITEMS_PER_CMD : items;
-
- if (rioWriteBulkCount(r,'*',2+cmd_items*2) == 0) return 0;
- if (rioWriteBulkString(r,"HMSET",5) == 0) return 0;
- if (rioWriteBulkObject(r,key) == 0) return 0;
- }
- if (rioWriteBulkString(r,(char*)field,flen) == 0) return 0;
- if (rioWriteBulkString(r,(char*)val,vlen) == 0) return 0;
- if (++count == REDIS_AOF_REWRITE_ITEMS_PER_CMD) count = 0;
- items--;
+ if (rioWriteBulkCount(r,'*',2+cmd_items*2) == 0) return 0;
+ if (rioWriteBulkString(r,"HMSET",5) == 0) return 0;
+ if (rioWriteBulkObject(r,key) == 0) return 0;
}
- } else {
- dictIterator *di = dictGetIterator(o->ptr);
- dictEntry *de;
- while((de = dictNext(di)) != NULL) {
- robj *field = dictGetKey(de);
- robj *val = dictGetVal(de);
+ if (rioWriteHashIteratorCursor(r, hi, REDIS_HASH_KEY) == 0) return 0;
+ if (rioWriteHashIteratorCursor(r, hi, REDIS_HASH_VALUE) == 0) return 0;
+ if (++count == REDIS_AOF_REWRITE_ITEMS_PER_CMD) count = 0;
+ items--;
+ }
- if (count == 0) {
- int cmd_items = (items > REDIS_AOF_REWRITE_ITEMS_PER_CMD) ?
- REDIS_AOF_REWRITE_ITEMS_PER_CMD : items;
+ hashTypeReleaseIterator(hi);
- if (rioWriteBulkCount(r,'*',2+cmd_items*2) == 0) return 0;
- if (rioWriteBulkString(r,"HMSET",5) == 0) return 0;
- if (rioWriteBulkObject(r,key) == 0) return 0;
- }
- if (rioWriteBulkObject(r,field) == 0) return 0;
- if (rioWriteBulkObject(r,val) == 0) return 0;
- if (++count == REDIS_AOF_REWRITE_ITEMS_PER_CMD) count = 0;
- items--;
- }
- dictReleaseIterator(di);
- }
return 1;
}
snprintf(tmpfile,256,"temp-rewriteaof-%d.aof", (int) getpid());
fp = fopen(tmpfile,"w");
if (!fp) {
- redisLog(REDIS_WARNING, "Failed rewriting the append only file: %s", strerror(errno));
+ redisLog(REDIS_WARNING, "Opening the temp file for AOF rewrite in rewriteAppendOnlyFile(): %s", strerror(errno));
return REDIS_ERR;
}
* 1) The user calls BGREWRITEAOF
* 2) Redis calls this function, that forks():
* 2a) the child rewrite the append only file in a temp file.
- * 2b) the parent accumulates differences in server.bgrewritebuf.
+ * 2b) the parent accumulates differences in server.aof_rewrite_buf.
* 3) When the child finished '2a' exists.
* 4) The parent will trap the exit code, if it's OK, will append the
- * data accumulated into server.bgrewritebuf into the temp file, and
+ * data accumulated into server.aof_rewrite_buf into the temp file, and
* finally will rename(2) the temp file in the actual file name.
* The the new file is reopened as the new append only file. Profit!
*/
pid_t childpid;
long long start;
- if (server.bgrewritechildpid != -1) return REDIS_ERR;
+ if (server.aof_child_pid != -1) return REDIS_ERR;
start = ustime();
if ((childpid = fork()) == 0) {
char tmpfile[256];
redisLog(REDIS_NOTICE,
"Background append only file rewriting started by pid %d",childpid);
server.aof_rewrite_scheduled = 0;
- server.bgrewritechildpid = childpid;
+ server.aof_child_pid = childpid;
updateDictResizePolicy();
/* We set appendseldb to -1 in order to force the next call to the
* feedAppendOnlyFile() to issue a SELECT command, so the differences
- * accumulated by the parent into server.bgrewritebuf will start
+ * accumulated by the parent into server.aof_rewrite_buf will start
* with a SELECT statement and it will be safe to merge. */
- server.appendseldb = -1;
+ server.aof_selected_db = -1;
return REDIS_OK;
}
return REDIS_OK; /* unreached */
}
void bgrewriteaofCommand(redisClient *c) {
- if (server.bgrewritechildpid != -1) {
+ if (server.aof_child_pid != -1) {
addReplyError(c,"Background append only file rewriting already in progress");
- } else if (server.bgsavechildpid != -1) {
+ } else if (server.rdb_child_pid != -1) {
server.aof_rewrite_scheduled = 1;
addReplyStatus(c,"Background append only file rewriting scheduled");
} else if (rewriteAppendOnlyFileBackground() == REDIS_OK) {
/* Update the server.aof_current_size filed explicitly using stat(2)
* to check the size of the file. This is useful after a rewrite or after
* a restart, normally the size is updated just adding the write length
- * to the current lenght, that is much faster. */
+ * to the current length, that is much faster. */
void aofUpdateCurrentSize(void) {
struct redis_stat sb;
- if (redis_fstat(server.appendfd,&sb) == -1) {
- redisLog(REDIS_WARNING,"Unable to check the AOF length: %s",
+ if (redis_fstat(server.aof_fd,&sb) == -1) {
+ redisLog(REDIS_WARNING,"Unable to obtain the AOF file length. stat: %s",
strerror(errno));
} else {
server.aof_current_size = sb.st_size;
/* Flush the differences accumulated by the parent to the
* rewritten AOF. */
snprintf(tmpfile,256,"temp-rewriteaof-bg-%d.aof",
- (int)server.bgrewritechildpid);
+ (int)server.aof_child_pid);
newfd = open(tmpfile,O_WRONLY|O_APPEND);
if (newfd == -1) {
redisLog(REDIS_WARNING,
goto cleanup;
}
- nwritten = write(newfd,server.bgrewritebuf,sdslen(server.bgrewritebuf));
- if (nwritten != (signed)sdslen(server.bgrewritebuf)) {
+ nwritten = write(newfd,server.aof_rewrite_buf,sdslen(server.aof_rewrite_buf));
+ if (nwritten != (signed)sdslen(server.aof_rewrite_buf)) {
if (nwritten == -1) {
redisLog(REDIS_WARNING,
"Error trying to flush the parent diff to the rewritten AOF: %s", strerror(errno));
* guarantee atomicity for this switch has already happened by then, so
* we don't care what the outcome or duration of that close operation
* is, as long as the file descriptor is released again. */
- if (server.appendfd == -1) {
+ if (server.aof_fd == -1) {
/* AOF disabled */
/* Don't care if this fails: oldfd will be -1 and we handle that.
* it exists, because we reference it with "oldfd". */
if (rename(tmpfile,server.aof_filename) == -1) {
redisLog(REDIS_WARNING,
- "Error trying to rename the temporary AOF: %s", strerror(errno));
+ "Error trying to rename the temporary AOF file: %s", strerror(errno));
close(newfd);
if (oldfd != -1) close(oldfd);
goto cleanup;
}
- if (server.appendfd == -1) {
+ if (server.aof_fd == -1) {
/* AOF disabled, we don't need to set the AOF file descriptor
* to this new file, so we can close it. */
close(newfd);
} else {
/* AOF enabled, replace the old fd with the new one. */
- oldfd = server.appendfd;
- server.appendfd = newfd;
+ oldfd = server.aof_fd;
+ server.aof_fd = newfd;
if (server.aof_fsync == AOF_FSYNC_ALWAYS)
aof_fsync(newfd);
else if (server.aof_fsync == AOF_FSYNC_EVERYSEC)
aof_background_fsync(newfd);
- server.appendseldb = -1; /* Make sure SELECT is re-issued */
+ server.aof_selected_db = -1; /* Make sure SELECT is re-issued */
aofUpdateCurrentSize();
server.aof_rewrite_base_size = server.aof_current_size;
/* Clear regular AOF buffer since its contents was just written to
* the new AOF from the background rewrite buffer. */
- sdsfree(server.aofbuf);
- server.aofbuf = sdsempty();
+ sdsfree(server.aof_buf);
+ server.aof_buf = sdsempty();
}
- redisLog(REDIS_NOTICE, "Background AOF rewrite successful");
+ redisLog(REDIS_NOTICE, "Background AOF rewrite finished successfully");
/* Change state from WAIT_REWRITE to ON if needed */
if (server.aof_state == REDIS_AOF_WAIT_REWRITE)
server.aof_state = REDIS_AOF_ON;
}
cleanup:
- sdsfree(server.bgrewritebuf);
- server.bgrewritebuf = sdsempty();
- aofRemoveTempFile(server.bgrewritechildpid);
- server.bgrewritechildpid = -1;
+ sdsfree(server.aof_rewrite_buf);
+ server.aof_rewrite_buf = sdsempty();
+ aofRemoveTempFile(server.aof_child_pid);
+ server.aof_child_pid = -1;
/* Schedule a new rewrite if we are waiting for it to switch the AOF ON. */
if (server.aof_state == REDIS_AOF_WAIT_REWRITE)
server.aof_rewrite_scheduled = 1;
projects / redis.git / blobdiff