#include <sys/resource.h>
#include <sys/wait.h>
#include <arpa/inet.h>
+#include <sys/stat.h>
+
+/* Convenience wrapper around fwrite, that returns the number of bytes written
+ * to the file instead of the number of objects (see fwrite(3)) and -1 in the
+ * case of an error. It also supports a NULL *fp to skip writing altogether
+ * instead of writing to /dev/null. */
+static int rdbWriteRaw(FILE *fp, void *p, size_t len) {
+ if (fp != NULL && fwrite(p,len,1,fp) == 0) return -1;
+ return len;
+}
int rdbSaveType(FILE *fp, unsigned char type) {
- if (fwrite(&type,1,1,fp) == 0) return -1;
- return 0;
+ return rdbWriteRaw(fp,&type,1);
}
int rdbSaveTime(FILE *fp, time_t t) {
int32_t t32 = (int32_t) t;
- if (fwrite(&t32,4,1,fp) == 0) return -1;
- return 0;
+ return rdbWriteRaw(fp,&t32,4);
}
/* check rdbLoadLen() comments for more info */
int rdbSaveLen(FILE *fp, uint32_t len) {
unsigned char buf[2];
+ int nwritten;
if (len < (1<<6)) {
/* Save a 6 bit len */
buf[0] = (len&0xFF)|(REDIS_RDB_6BITLEN<<6);
- if (fwrite(buf,1,1,fp) == 0) return -1;
+ if (rdbWriteRaw(fp,buf,1) == -1) return -1;
+ nwritten = 1;
} else if (len < (1<<14)) {
/* Save a 14 bit len */
buf[0] = ((len>>8)&0xFF)|(REDIS_RDB_14BITLEN<<6);
buf[1] = len&0xFF;
- if (fwrite(buf,2,1,fp) == 0) return -1;
+ if (rdbWriteRaw(fp,buf,2) == -1) return -1;
+ nwritten = 2;
} else {
/* Save a 32 bit len */
buf[0] = (REDIS_RDB_32BITLEN<<6);
- if (fwrite(buf,1,1,fp) == 0) return -1;
+ if (rdbWriteRaw(fp,buf,1) == -1) return -1;
len = htonl(len);
- if (fwrite(&len,4,1,fp) == 0) return -1;
+ if (rdbWriteRaw(fp,&len,4) == -1) return -1;
+ nwritten = 1+4;
}
- return 0;
+ return nwritten;
}
/* Encode 'value' as an integer if possible (if integer will fit the
int rdbSaveLzfStringObject(FILE *fp, unsigned char *s, size_t len) {
size_t comprlen, outlen;
unsigned char byte;
+ int n, nwritten = 0;
void *out;
/* We require at least four bytes compression for this to be worth it */
}
/* Data compressed! Let's save it on disk */
byte = (REDIS_RDB_ENCVAL<<6)|REDIS_RDB_ENC_LZF;
- if (fwrite(&byte,1,1,fp) == 0) goto writeerr;
- if (rdbSaveLen(fp,comprlen) == -1) goto writeerr;
- if (rdbSaveLen(fp,len) == -1) goto writeerr;
- if (fwrite(out,comprlen,1,fp) == 0) goto writeerr;
+ if ((n = rdbWriteRaw(fp,&byte,1)) == -1) goto writeerr;
+ nwritten += n;
+
+ if ((n = rdbSaveLen(fp,comprlen)) == -1) goto writeerr;
+ nwritten += n;
+
+ if ((n = rdbSaveLen(fp,len)) == -1) goto writeerr;
+ nwritten += n;
+
+ if ((n = rdbWriteRaw(fp,out,comprlen)) == -1) goto writeerr;
+ nwritten += n;
+
zfree(out);
- return comprlen;
+ return nwritten;
writeerr:
zfree(out);
* representation of an integer value we try to safe it in a special form */
int rdbSaveRawString(FILE *fp, unsigned char *s, size_t len) {
int enclen;
+ int n, nwritten = 0;
/* Try integer encoding */
if (len <= 11) {
unsigned char buf[5];
if ((enclen = rdbTryIntegerEncoding((char*)s,len,buf)) > 0) {
- if (fwrite(buf,enclen,1,fp) == 0) return -1;
- return 0;
+ if (rdbWriteRaw(fp,buf,enclen) == -1) return -1;
+ return enclen;
}
}
/* Try LZF compression - under 20 bytes it's unable to compress even
* aaaaaaaaaaaaaaaaaa so skip it */
if (server.rdbcompression && len > 20) {
- int retval;
-
- retval = rdbSaveLzfStringObject(fp,s,len);
- if (retval == -1) return -1;
- if (retval > 0) return 0;
- /* retval == 0 means data can't be compressed, save the old way */
+ n = rdbSaveLzfStringObject(fp,s,len);
+ if (n == -1) return -1;
+ if (n > 0) return n;
+ /* Return value of 0 means data can't be compressed, save the old way */
}
/* Store verbatim */
- if (rdbSaveLen(fp,len) == -1) return -1;
- if (len && fwrite(s,len,1,fp) == 0) return -1;
- return 0;
+ if ((n = rdbSaveLen(fp,len)) == -1) return -1;
+ nwritten += n;
+ if (len > 0) {
+ if (rdbWriteRaw(fp,s,len) == -1) return -1;
+ nwritten += len;
+ }
+ return nwritten;
}
/* Save a long long value as either an encoded string or a string. */
int rdbSaveLongLongAsStringObject(FILE *fp, long long value) {
unsigned char buf[32];
+ int n, nwritten = 0;
int enclen = rdbEncodeInteger(value,buf);
if (enclen > 0) {
- if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ return rdbWriteRaw(fp,buf,enclen);
} else {
/* Encode as string */
enclen = ll2string((char*)buf,32,value);
redisAssert(enclen < 32);
- if (rdbSaveLen(fp,enclen) == -1) return -1;
- if (fwrite(buf,enclen,1,fp) == 0) return -1;
+ if ((n = rdbSaveLen(fp,enclen)) == -1) return -1;
+ nwritten += n;
+ if ((n = rdbWriteRaw(fp,buf,enclen)) == -1) return -1;
+ nwritten += n;
}
- return 0;
+ return nwritten;
}
/* Like rdbSaveStringObjectRaw() but handle encoded objects */
buf[0] = strlen((char*)buf+1);
len = buf[0]+1;
}
- if (fwrite(buf,len,1,fp) == 0) return -1;
- return 0;
+ return rdbWriteRaw(fp,buf,len);
}
/* Save a Redis object. */
int rdbSaveObject(FILE *fp, robj *o) {
+ int n, nwritten = 0;
+
if (o->type == REDIS_STRING) {
/* Save a string value */
- if (rdbSaveStringObject(fp,o) == -1) return -1;
+ if ((n = rdbSaveStringObject(fp,o)) == -1) return -1;
+ nwritten += n;
} else if (o->type == REDIS_LIST) {
/* Save a list value */
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned int vlen;
long long vlong;
- if (rdbSaveLen(fp,ziplistLen(o->ptr)) == -1) return -1;
+ if ((n = rdbSaveLen(fp,ziplistLen(o->ptr))) == -1) return -1;
+ nwritten += n;
+
p = ziplistIndex(o->ptr,0);
while(ziplistGet(p,&vstr,&vlen,&vlong)) {
if (vstr) {
- if (rdbSaveRawString(fp,vstr,vlen) == -1)
+ if ((n = rdbSaveRawString(fp,vstr,vlen)) == -1)
return -1;
+ nwritten += n;
} else {
- if (rdbSaveLongLongAsStringObject(fp,vlong) == -1)
+ if ((n = rdbSaveLongLongAsStringObject(fp,vlong)) == -1)
return -1;
+ nwritten += n;
}
p = ziplistNext(o->ptr,p);
}
listIter li;
listNode *ln;
- if (rdbSaveLen(fp,listLength(list)) == -1) return -1;
+ if ((n = rdbSaveLen(fp,listLength(list))) == -1) return -1;
+ nwritten += n;
+
listRewind(list,&li);
while((ln = listNext(&li))) {
robj *eleobj = listNodeValue(ln);
- if (rdbSaveStringObject(fp,eleobj) == -1) return -1;
+ if ((n = rdbSaveStringObject(fp,eleobj)) == -1) return -1;
+ nwritten += n;
}
} else {
redisPanic("Unknown list encoding");
dictIterator *di = dictGetIterator(set);
dictEntry *de;
- if (rdbSaveLen(fp,dictSize(set)) == -1) return -1;
+ if ((n = rdbSaveLen(fp,dictSize(set))) == -1) return -1;
+ nwritten += n;
+
while((de = dictNext(di)) != NULL) {
robj *eleobj = dictGetEntryKey(de);
- if (rdbSaveStringObject(fp,eleobj) == -1) return -1;
+ if ((n = rdbSaveStringObject(fp,eleobj)) == -1) return -1;
+ nwritten += n;
}
dictReleaseIterator(di);
} else if (o->encoding == REDIS_ENCODING_INTSET) {
int64_t llval;
int i = 0;
- if (rdbSaveLen(fp,intsetLen(is)) == -1) return -1;
+ if ((n = rdbSaveLen(fp,intsetLen(is))) == -1) return -1;
+ nwritten += n;
+
while(intsetGet(is,i++,&llval)) {
- if (rdbSaveLongLongAsStringObject(fp,llval) == -1) return -1;
+ if ((n = rdbSaveLongLongAsStringObject(fp,llval)) == -1) return -1;
+ nwritten += n;
}
} else {
redisPanic("Unknown set encoding");
dictIterator *di = dictGetIterator(zs->dict);
dictEntry *de;
- if (rdbSaveLen(fp,dictSize(zs->dict)) == -1) return -1;
+ 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 (rdbSaveStringObject(fp,eleobj) == -1) return -1;
- if (rdbSaveDoubleValue(fp,*score) == -1) return -1;
+ if ((n = rdbSaveStringObject(fp,eleobj)) == -1) return -1;
+ nwritten += n;
+ if ((n = rdbSaveDoubleValue(fp,*score)) == -1) return -1;
+ nwritten += n;
}
dictReleaseIterator(di);
} else if (o->type == REDIS_HASH) {
unsigned char *key, *val;
unsigned int klen, vlen;
- if (rdbSaveLen(fp,count) == -1) return -1;
+ if ((n = rdbSaveLen(fp,count)) == -1) return -1;
+ nwritten += n;
+
while((p = zipmapNext(p,&key,&klen,&val,&vlen)) != NULL) {
- if (rdbSaveRawString(fp,key,klen) == -1) return -1;
- if (rdbSaveRawString(fp,val,vlen) == -1) return -1;
+ 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;
- if (rdbSaveLen(fp,dictSize((dict*)o->ptr)) == -1) return -1;
+ if ((n = rdbSaveLen(fp,dictSize((dict*)o->ptr))) == -1) return -1;
+ nwritten += n;
+
while((de = dictNext(di)) != NULL) {
robj *key = dictGetEntryKey(de);
robj *val = dictGetEntryVal(de);
- if (rdbSaveStringObject(fp,key) == -1) return -1;
- if (rdbSaveStringObject(fp,val) == -1) return -1;
+ if ((n = rdbSaveStringObject(fp,key)) == -1) return -1;
+ nwritten += n;
+ if ((n = rdbSaveStringObject(fp,val)) == -1) return -1;
+ nwritten += n;
}
dictReleaseIterator(di);
}
} else {
redisPanic("Unknown object type");
}
- return 0;
+ return nwritten;
}
/* Return the length the object will have on disk if saved with
* the rdbSaveObject() function. Currently we use a trick to get
* this length with very little changes to the code. In the future
* we could switch to a faster solution. */
-off_t rdbSavedObjectLen(robj *o, FILE *fp) {
- if (fp == NULL) fp = server.devnull;
- rewind(fp);
- redisAssert(rdbSaveObject(fp,o) != 1);
- return ftello(fp);
-}
-
-/* Return the number of pages required to save this object in the swap file */
-off_t rdbSavedObjectPages(robj *o, FILE *fp) {
- off_t bytes = rdbSavedObjectLen(o,fp);
-
- return (bytes+(server.vm_page_size-1))/server.vm_page_size;
+off_t rdbSavedObjectLen(robj *o) {
+ int len = rdbSaveObject(NULL,o);
+ redisAssert(len != -1);
+ return len;
}
/* Save the DB on disk. Return REDIS_ERR on error, REDIS_OK on success */
int j;
time_t now = time(NULL);
- /* Wait for I/O therads to terminate, just in case this is a
- * foreground-saving, to avoid seeking the swap file descriptor at the
- * same time. */
- if (server.vm_enabled)
- waitEmptyIOJobsQueue();
+ /* FIXME: implement .rdb save for disk store properly */
+ redisAssert(server.ds_enabled == 0);
snprintf(tmpfile,256,"temp-%d.rdb", (int) getpid());
fp = fopen(tmpfile,"w");
if (rdbSaveType(fp,REDIS_EXPIRETIME) == -1) goto werr;
if (rdbSaveTime(fp,expiretime) == -1) goto werr;
}
- /* Save the key and associated value. This requires special
- * handling if the value is swapped out. */
- if (!server.vm_enabled || o->storage == REDIS_VM_MEMORY ||
- o->storage == REDIS_VM_SWAPPING) {
- /* Save type, key, value */
- if (rdbSaveType(fp,o->type) == -1) goto werr;
- if (rdbSaveStringObject(fp,&key) == -1) goto werr;
- if (rdbSaveObject(fp,o) == -1) goto werr;
- } else {
- /* REDIS_VM_SWAPPED or REDIS_VM_LOADING */
- robj *po;
- /* Get a preview of the object in memory */
- po = vmPreviewObject(o);
- /* Save type, key, value */
- if (rdbSaveType(fp,po->type) == -1) goto werr;
- if (rdbSaveStringObject(fp,&key) == -1) goto werr;
- if (rdbSaveObject(fp,po) == -1) goto werr;
- /* Remove the loaded object from memory */
- decrRefCount(po);
- }
+ /* Save type, key, value */
+ if (rdbSaveType(fp,o->type) == -1) goto werr;
+ if (rdbSaveStringObject(fp,&key) == -1) goto werr;
+ if (rdbSaveObject(fp,o) == -1) goto werr;
}
dictReleaseIterator(di);
}
pid_t childpid;
if (server.bgsavechildpid != -1) return REDIS_ERR;
- if (server.vm_enabled) waitEmptyIOJobsQueue();
+ redisAssert(server.ds_enabled == 0);
server.dirty_before_bgsave = server.dirty;
if ((childpid = fork()) == 0) {
/* Child */
- if (server.vm_enabled) vmReopenSwapFile();
if (server.ipfd > 0) close(server.ipfd);
if (server.sofd > 0) close(server.sofd);
if (rdbSave(filename) == REDIS_OK) {
return o;
}
+/* Mark that we are loading in the global state and setup the fields
+ * needed to provide loading stats. */
+void startLoading(FILE *fp) {
+ struct stat sb;
+
+ /* Load the DB */
+ server.loading = 1;
+ server.loading_start_time = time(NULL);
+ if (fstat(fileno(fp), &sb) == -1) {
+ server.loading_total_bytes = 1; /* just to avoid division by zero */
+ } else {
+ server.loading_total_bytes = sb.st_size;
+ }
+}
+
+/* Refresh the loading progress info */
+void loadingProgress(off_t pos) {
+ server.loading_loaded_bytes = pos;
+}
+
+/* Loading finished */
+void stopLoading(void) {
+ server.loading = 0;
+}
+
int rdbLoad(char *filename) {
FILE *fp;
uint32_t dbid;
int type, retval, rdbver;
- int swap_all_values = 0;
redisDb *db = server.db+0;
char buf[1024];
time_t expiretime, now = time(NULL);
+ long loops = 0;
fp = fopen(filename,"r");
if (!fp) return REDIS_ERR;
redisLog(REDIS_WARNING,"Can't handle RDB format version %d",rdbver);
return REDIS_ERR;
}
+
+ startLoading(fp);
while(1) {
robj *key, *val;
- int force_swapout;
-
expiretime = -1;
+
+ /* Serve the clients from time to time */
+ if (!(loops++ % 1000)) {
+ loadingProgress(ftello(fp));
+ aeProcessEvents(server.el, AE_FILE_EVENTS|AE_DONT_WAIT);
+ }
+
/* Read type. */
if ((type = rdbLoadType(fp)) == -1) goto eoferr;
if (type == REDIS_EXPIRETIME) {
/* Set the expire time if needed */
if (expiretime != -1) setExpire(db,key,expiretime);
- /* Handle swapping while loading big datasets when VM is on */
-
- /* If we detecter we are hopeless about fitting something in memory
- * we just swap every new key on disk. Directly...
- * Note that's important to check for this condition before resorting
- * to random sampling, otherwise we may try to swap already
- * swapped keys. */
- if (swap_all_values) {
- dictEntry *de = dictFind(db->dict,key->ptr);
-
- /* de may be NULL since the key already expired */
- if (de) {
- vmpointer *vp;
- val = dictGetEntryVal(de);
-
- if (val->refcount == 1 &&
- (vp = vmSwapObjectBlocking(val)) != NULL)
- dictGetEntryVal(de) = vp;
- }
- decrRefCount(key);
- continue;
- }
decrRefCount(key);
-
- /* Flush data on disk once 32 MB of additional RAM are used... */
- force_swapout = 0;
- if ((zmalloc_used_memory() - server.vm_max_memory) > 1024*1024*32)
- force_swapout = 1;
-
- /* If we have still some hope of having some value fitting memory
- * then we try random sampling. */
- if (!swap_all_values && server.vm_enabled && force_swapout) {
- while (zmalloc_used_memory() > server.vm_max_memory) {
- if (vmSwapOneObjectBlocking() == REDIS_ERR) break;
- }
- if (zmalloc_used_memory() > server.vm_max_memory)
- swap_all_values = 1; /* We are already using too much mem */
- }
}
fclose(fp);
+ stopLoading();
return REDIS_OK;
eoferr: /* unexpected end of file is handled here with a fatal exit */
projects / redis.git / blobdiff