}
/* Save a string objet as [len][data] on disk. If the object is a string
- * representation of an integer value we try to safe it in a special form */
+ * representation of an integer value we try to save it in a special form */
int rdbSaveRawString(FILE *fp, unsigned char *s, size_t len) {
int enclen;
int n, nwritten = 0;
return rdbWriteRaw(fp,buf,len);
}
-/* Save a Redis object. */
+/* Save a Redis object. Returns -1 on error, 0 on success. */
int rdbSaveObject(FILE *fp, robj *o) {
int n, nwritten = 0;
} else if (o->type == REDIS_LIST) {
/* Save a list value */
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
- unsigned char *p;
- unsigned char *vstr;
- unsigned int vlen;
- long long vlong;
+ size_t l = ziplistBlobLen((unsigned char*)o->ptr);
- if ((n = rdbSaveLen(fp,ziplistLen(o->ptr))) == -1) return -1;
+ if ((n = rdbSaveRawString(fp,o->ptr,l)) == -1) return -1;
nwritten += n;
-
- p = ziplistIndex(o->ptr,0);
- while(ziplistGet(p,&vstr,&vlen,&vlong)) {
- if (vstr) {
- if ((n = rdbSaveRawString(fp,vstr,vlen)) == -1)
- return -1;
- nwritten += n;
- } else {
- if ((n = rdbSaveLongLongAsStringObject(fp,vlong)) == -1)
- return -1;
- nwritten += n;
- }
- p = ziplistNext(o->ptr,p);
- }
} else if (o->encoding == REDIS_ENCODING_LINKEDLIST) {
list *list = o->ptr;
listIter li;
}
dictReleaseIterator(di);
} else if (o->encoding == REDIS_ENCODING_INTSET) {
- intset *is = o->ptr;
- int64_t llval;
- int i = 0;
+ size_t l = intsetBlobLen((intset*)o->ptr);
- if ((n = rdbSaveLen(fp,intsetLen(is))) == -1) return -1;
+ if ((n = rdbSaveRawString(fp,o->ptr,l)) == -1) return -1;
nwritten += n;
-
- while(intsetGet(is,i++,&llval)) {
- if ((n = rdbSaveLongLongAsStringObject(fp,llval)) == -1) return -1;
- nwritten += n;
- }
} else {
redisPanic("Unknown set encoding");
}
} else if (o->type == REDIS_ZSET) {
- /* Save a set value */
- zset *zs = o->ptr;
- dictIterator *di = dictGetIterator(zs->dict);
- dictEntry *de;
-
- if ((n = rdbSaveLen(fp,dictSize(zs->dict))) == -1) return -1;
- nwritten += n;
-
- while((de = dictNext(di)) != NULL) {
- robj *eleobj = dictGetEntryKey(de);
- double *score = dictGetEntryVal(de);
+ /* Save a sorted set value */
+ if (o->encoding == REDIS_ENCODING_ZIPLIST) {
+ size_t l = ziplistBlobLen((unsigned char*)o->ptr);
- if ((n = rdbSaveStringObject(fp,eleobj)) == -1) return -1;
+ if ((n = rdbSaveRawString(fp,o->ptr,l)) == -1) return -1;
nwritten += n;
- if ((n = rdbSaveDoubleValue(fp,*score)) == -1) return -1;
+ } else if (o->encoding == REDIS_ENCODING_SKIPLIST) {
+ zset *zs = o->ptr;
+ dictIterator *di = dictGetIterator(zs->dict);
+ dictEntry *de;
+
+ if ((n = rdbSaveLen(fp,dictSize(zs->dict))) == -1) return -1;
nwritten += n;
+
+ while((de = dictNext(di)) != NULL) {
+ robj *eleobj = dictGetEntryKey(de);
+ double *score = dictGetEntryVal(de);
+
+ if ((n = rdbSaveStringObject(fp,eleobj)) == -1) return -1;
+ nwritten += n;
+ if ((n = rdbSaveDoubleValue(fp,*score)) == -1) return -1;
+ nwritten += n;
+ }
+ dictReleaseIterator(di);
+ } else {
+ redisPanic("Unknown sorted set encoding");
}
- dictReleaseIterator(di);
} else if (o->type == REDIS_HASH) {
/* Save a hash value */
if (o->encoding == REDIS_ENCODING_ZIPMAP) {
- unsigned char *p = zipmapRewind(o->ptr);
- unsigned int count = zipmapLen(o->ptr);
- unsigned char *key, *val;
- unsigned int klen, vlen;
+ size_t l = zipmapBlobLen((unsigned char*)o->ptr);
- if ((n = rdbSaveLen(fp,count)) == -1) return -1;
+ if ((n = rdbSaveRawString(fp,o->ptr,l)) == -1) return -1;
nwritten += n;
-
- while((p = zipmapNext(p,&key,&klen,&val,&vlen)) != NULL) {
- if ((n = rdbSaveRawString(fp,key,klen)) == -1) return -1;
- nwritten += n;
- if ((n = rdbSaveRawString(fp,val,vlen)) == -1) return -1;
- nwritten += n;
- }
} else {
dictIterator *di = dictGetIterator(o->ptr);
dictEntry *de;
* On error -1 is returned.
* On success if the key was actaully saved 1 is returned, otherwise 0
* is returned (the key was already expired). */
-int rdbSaveKeyValuePair(FILE *fp, redisDb *db, robj *key, robj *val,
- time_t now)
+int rdbSaveKeyValuePair(FILE *fp, robj *key, robj *val,
+ time_t expiretime, time_t now)
{
- time_t expiretime;
-
- expiretime = getExpire(db,key);
+ int vtype;
/* Save the expire time */
if (expiretime != -1) {
if (rdbSaveType(fp,REDIS_EXPIRETIME) == -1) return -1;
if (rdbSaveTime(fp,expiretime) == -1) return -1;
}
+ /* Fix the object type if needed, to support saving zipmaps, ziplists,
+ * and intsets, directly as blobs of bytes: they are already serialized. */
+ vtype = val->type;
+ if (vtype == REDIS_HASH && val->encoding == REDIS_ENCODING_ZIPMAP)
+ vtype = REDIS_HASH_ZIPMAP;
+ else if (vtype == REDIS_LIST && val->encoding == REDIS_ENCODING_ZIPLIST)
+ vtype = REDIS_LIST_ZIPLIST;
+ else if (vtype == REDIS_SET && val->encoding == REDIS_ENCODING_INTSET)
+ vtype = REDIS_SET_INTSET;
+ else if (vtype == REDIS_ZSET && val->encoding == REDIS_ENCODING_ZIPLIST)
+ vtype = REDIS_ZSET_ZIPLIST;
/* Save type, key, value */
- if (rdbSaveType(fp,val->type) == -1) return -1;
+ if (rdbSaveType(fp,vtype) == -1) return -1;
if (rdbSaveStringObject(fp,key) == -1) return -1;
if (rdbSaveObject(fp,val) == -1) return -1;
return 1;
snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
fp = fopen(tmpfile,"w");
if (!fp) {
- redisLog(REDIS_WARNING, "Failed saving the DB: %s", strerror(errno));
+ redisLog(REDIS_WARNING, "Failed opening .rdb for saving: %s",
+ strerror(errno));
return REDIS_ERR;
}
- if (fwrite("REDIS0001",9,1,fp) == 0) goto werr;
+ if (fwrite("REDIS0002",9,1,fp) == 0) goto werr;
for (j = 0; j < server.dbnum; j++) {
redisDb *db = server.db+j;
dict *d = db->dict;
while((de = dictNext(di)) != NULL) {
sds keystr = dictGetEntryKey(de);
robj key, *o = dictGetEntryVal(de);
+ time_t expire;
initStaticStringObject(key,keystr);
- if (rdbSaveKeyValuePair(fp,db,&key,o,now) == -1) goto werr;
+ expire = getExpire(db,&key);
+ if (rdbSaveKeyValuePair(fp,&key,o,expire,now) == -1) goto werr;
}
dictReleaseIterator(di);
}
int rdbSaveBackground(char *filename) {
pid_t childpid;
+ long long start;
if (server.bgsavechildpid != -1 ||
server.bgsavethread != (pthread_t) -1) return REDIS_ERR;
if (server.ds_enabled) {
cacheForcePointInTime();
- return dsRdbSave(filename);
+ return dsRdbSaveBackground(filename);
}
+ start = ustime();
if ((childpid = fork()) == 0) {
int retval;
_exit((retval == REDIS_OK) ? 0 : 1);
} else {
/* Parent */
+ server.stat_fork_time = ustime()-start;
if (childpid == -1) {
redisLog(REDIS_WARNING,"Can't save in background: fork: %s",
strerror(errno));
} else if (type == REDIS_ZSET) {
/* Read list/set value */
size_t zsetlen;
+ size_t maxelelen = 0;
zset *zs;
if ((zsetlen = rdbLoadLen(fp,NULL)) == REDIS_RDB_LENERR) return NULL;
o = createZsetObject();
zs = o->ptr;
+
/* Load every single element of the list/set */
while(zsetlen--) {
robj *ele;
if ((ele = rdbLoadEncodedStringObject(fp)) == NULL) return NULL;
ele = tryObjectEncoding(ele);
if (rdbLoadDoubleValue(fp,&score) == -1) return NULL;
+
+ /* Don't care about integer-encoded strings. */
+ if (ele->encoding == REDIS_ENCODING_RAW &&
+ sdslen(ele->ptr) > maxelelen)
+ maxelelen = sdslen(ele->ptr);
+
znode = zslInsert(zs->zsl,score,ele);
dictAdd(zs->dict,ele,&znode->score);
incrRefCount(ele); /* added to skiplist */
}
+
+ /* Convert *after* loading, since sorted sets are not stored ordered. */
+ if (zsetLength(o) <= server.zset_max_ziplist_entries &&
+ maxelelen <= server.zset_max_ziplist_value)
+ zsetConvert(o,REDIS_ENCODING_ZIPLIST);
} else if (type == REDIS_HASH) {
size_t hashlen;
dictAdd((dict*)o->ptr,key,val);
}
}
+ } else if (type == REDIS_HASH_ZIPMAP ||
+ type == REDIS_LIST_ZIPLIST ||
+ type == REDIS_SET_INTSET ||
+ type == REDIS_ZSET_ZIPLIST)
+ {
+ robj *aux = rdbLoadStringObject(fp);
+
+ if (aux == NULL) return NULL;
+ o = createObject(REDIS_STRING,NULL); /* string is just placeholder */
+ o->ptr = zmalloc(sdslen(aux->ptr));
+ memcpy(o->ptr,aux->ptr,sdslen(aux->ptr));
+ decrRefCount(aux);
+
+ /* Fix the object encoding, and make sure to convert the encoded
+ * data type into the base type if accordingly to the current
+ * configuration there are too many elements in the encoded data
+ * type. Note that we only check the length and not max element
+ * size as this is an O(N) scan. Eventually everything will get
+ * converted. */
+ switch(type) {
+ case REDIS_HASH_ZIPMAP:
+ o->type = REDIS_HASH;
+ o->encoding = REDIS_ENCODING_ZIPMAP;
+ if (zipmapLen(o->ptr) > server.hash_max_zipmap_entries)
+ convertToRealHash(o);
+ break;
+ case REDIS_LIST_ZIPLIST:
+ o->type = REDIS_LIST;
+ o->encoding = REDIS_ENCODING_ZIPLIST;
+ if (ziplistLen(o->ptr) > server.list_max_ziplist_entries)
+ listTypeConvert(o,REDIS_ENCODING_LINKEDLIST);
+ break;
+ case REDIS_SET_INTSET:
+ o->type = REDIS_SET;
+ o->encoding = REDIS_ENCODING_INTSET;
+ if (intsetLen(o->ptr) > server.set_max_intset_entries)
+ setTypeConvert(o,REDIS_ENCODING_HT);
+ break;
+ case REDIS_ZSET_ZIPLIST:
+ o->type = REDIS_ZSET;
+ o->encoding = REDIS_ENCODING_ZIPLIST;
+ if (zsetLength(o) > server.zset_max_ziplist_entries)
+ zsetConvert(o,REDIS_ENCODING_SKIPLIST);
+ break;
+ default:
+ redisPanic("Unknown encoding");
+ break;
+ }
} else {
redisPanic("Unknown object type");
}
return REDIS_ERR;
}
rdbver = atoi(buf+5);
- if (rdbver != 1) {
+ if (rdbver < 1 || rdbver > 2) {
fclose(fp);
redisLog(REDIS_WARNING,"Can't handle RDB format version %d",rdbver);
return REDIS_ERR;
}
void saveCommand(redisClient *c) {
- if (server.bgsavechildpid != -1 || server.bgsavethread != (pthread-t)-1) {
+ if (server.bgsavechildpid != -1 || server.bgsavethread != (pthread_t)-1) {
addReplyError(c,"Background save already in progress");
return;
}
}
void bgsaveCommand(redisClient *c) {
- if (server.bgsavechildpid != -1 || server.bgsavethread != (pthread-t)-1) {
+ if (server.bgsavechildpid != -1 || server.bgsavethread != (pthread_t)-1) {
addReplyError(c,"Background save already in progress");
- return;
- }
- if (rdbSaveBackground(server.dbfilename) == REDIS_OK) {
+ } else if (server.bgrewritechildpid != -1) {
+ addReplyError(c,"Can't BGSAVE while AOF log rewriting is in progress");
+ } else if (rdbSaveBackground(server.dbfilename) == REDIS_OK) {
addReplyStatus(c,"Background saving started");
} else {
addReply(c,shared.err);
projects / redis.git / blobdiff