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authorAmar Tumballi <amar@gluster.com>2010-10-01 13:04:57 +0000
committerVijay Bellur <vijay@dev.gluster.com>2010-10-01 22:38:54 -0700
commit17295c37f9ad12163f7c449dbe6f76aff90b493f (patch)
treeb0fef4609378baae8c4e4d814bab3fe4efd9331f
parent4afbc4e1c44d5da4d4cd6141fb2b693e7baeabe4 (diff)
rebalance: bring in two stagesv3.1.0qa37
step 1: fix layout (quick pass, so the newly added brick can participate in distribute's entry creations) step 2: migrate data (do the actual rebalance) Its advised to run rebalance after add-brick, and let it complete at-least 'step 1', so things will be smooth with distribute. Signed-off-by: Amar Tumballi <amar@gluster.com> Signed-off-by: Vijay Bellur <vijay@dev.gluster.com> BUG: 971 (dynamic volume management) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971
-rw-r--r--cli/src/cli3_1-cops.c13
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-rebalance.c194
-rw-r--r--xlators/mgmt/glusterd/src/glusterd.h1
3 files changed, 140 insertions, 68 deletions
diff --git a/cli/src/cli3_1-cops.c b/cli/src/cli3_1-cops.c
index ecf454c..1538a4c 100644
--- a/cli/src/cli3_1-cops.c
+++ b/cli/src/cli3_1-cops.c
@@ -681,15 +681,20 @@ gf_cli3_1_defrag_volume_cbk (struct rpc_req *req, struct iovec *iov,
if (rsp.op_errno == 0)
status = "not started";
if (rsp.op_errno == 1)
- status = "in progress";
+ status = "step 1: layout fix in progress";
if (rsp.op_errno == 2)
- status = "stopped";
+ status = "step 2: data migration in progress";
if (rsp.op_errno == 3)
- status = "completed";
+ status = "stopped";
if (rsp.op_errno == 4)
+ status = "completed";
+ if (rsp.op_errno == 5)
status = "failed";
- if (rsp.files) {
+ if (rsp.files && (rsp.op_errno == 1)) {
+ cli_out ("rebalance %s: fixed layout %"PRId64,
+ status, rsp.files);
+ } else if (rsp.files) {
cli_out ("rebalance %s: rebalanced %"PRId64
" files of size %"PRId64" (total files"
" scanned %"PRId64")", status,
diff --git a/xlators/mgmt/glusterd/src/glusterd-rebalance.c b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
index 1401b4f..6583dcb0 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rebalance.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
@@ -37,10 +37,11 @@
#include "glusterd-utils.h"
#include "glusterd-store.h"
+#include "syscall.h"
#include "cli1.h"
int
-glusterd_check_and_rebalance (glusterd_volinfo_t *volinfo, char *dir)
+gf_glusterd_rebalance_move_data (glusterd_volinfo_t *volinfo, const char *dir)
{
int ret = -1;
int dst_fd = -1;
@@ -52,14 +53,12 @@ glusterd_check_and_rebalance (glusterd_volinfo_t *volinfo, char *dir)
struct stat new_stbuf = {0,};
char full_path[1024] = {0,};
char tmp_filename[1024] = {0,};
- char value[128] = {0,};
- defrag = volinfo->defrag;
- if (!defrag)
+ if (!volinfo->defrag)
goto out;
+ defrag = volinfo->defrag;
- /* Fix files at this level */
fd = opendir (dir);
if (!fd)
goto out;
@@ -76,75 +75,70 @@ glusterd_check_and_rebalance (glusterd_volinfo_t *volinfo, char *dir)
if (ret == -1)
continue;
- if (S_ISDIR (stbuf.st_mode)) {
- /* Fix the layout of the directory */
- getxattr (full_path, "trusted.distribute.fix.layout",
- &value, 128);
+ if (S_ISREG (stbuf.st_mode))
+ defrag->num_files_lookedup += 1;
+
+ if (!(S_ISREG (stbuf.st_mode) &&
+ ((stbuf.st_mode & 01000) == 01000)))
+ continue;
+
+ /* If its a regular file, and sticky bit is set, we need to
+ rebalance that */
+ snprintf (tmp_filename, 1024, "%s/.%s.gfs%llu", dir,
+ entry->d_name,
+ (unsigned long long)stbuf.st_size);
+
+ dst_fd = creat (tmp_filename, (stbuf.st_mode & ~01000));
+ if (dst_fd == -1)
+ continue;
+
+ src_fd = open (full_path, O_RDONLY);
+ if (src_fd == -1) {
+ close (dst_fd);
continue;
}
- if (S_ISREG (stbuf.st_mode) && ((stbuf.st_mode & 01000) == 01000)) {
- /* TODO: run the defrag */
- snprintf (tmp_filename, 1024, "%s/.%s.gfs%llu", dir,
- entry->d_name,
- (unsigned long long)stbuf.st_size);
-
- dst_fd = creat (tmp_filename, (stbuf.st_mode & ~01000));
- if (dst_fd == -1)
- continue;
-
- src_fd = open (full_path, O_RDONLY);
- if (src_fd == -1) {
+
+ while (1) {
+ ret = read (src_fd, defrag->databuf, 131072);
+ if (!ret || (ret < 0)) {
close (dst_fd);
- continue;
+ close (src_fd);
+ break;
}
-
- while (1) {
- ret = read (src_fd, defrag->databuf, 131072);
- if (!ret || (ret < 0)) {
- close (dst_fd);
- close (src_fd);
- break;
- }
- ret = write (dst_fd, defrag->databuf, ret);
- if (ret < 0) {
- close (dst_fd);
- close (src_fd);
- break;
- }
+ ret = write (dst_fd, defrag->databuf, ret);
+ if (ret < 0) {
+ close (dst_fd);
+ close (src_fd);
+ break;
}
+ }
- ret = stat (full_path, &new_stbuf);
- if (ret < 0)
- continue;
- if (new_stbuf.st_mtime != stbuf.st_mtime)
- continue;
-
- ret = rename (tmp_filename, full_path);
- if (ret != -1) {
- LOCK (&defrag->lock);
- {
- defrag->total_files += 1;
- defrag->total_data += stbuf.st_size;
- }
- UNLOCK (&defrag->lock);
- }
- } else {
+ ret = stat (full_path, &new_stbuf);
+ if (ret < 0)
+ continue;
+ /* No need to rebalance, if there is some
+ activity on source file */
+ if (new_stbuf.st_mtime != stbuf.st_mtime)
+ continue;
+
+ ret = rename (tmp_filename, full_path);
+ if (ret != -1) {
LOCK (&defrag->lock);
{
- if (S_ISREG (stbuf.st_mode))
- defrag->num_files_lookedup += 1;
+ defrag->total_files += 1;
+ defrag->total_data += stbuf.st_size;
}
UNLOCK (&defrag->lock);
}
if (volinfo->defrag_status == GF_DEFRAG_STATUS_STOPED) {
closedir (fd);
+ ret = -1;
goto out;
}
}
closedir (fd);
- /* Iterate over directories */
fd = opendir (dir);
if (!fd)
goto out;
@@ -161,18 +155,77 @@ glusterd_check_and_rebalance (glusterd_volinfo_t *volinfo, char *dir)
if (ret == -1)
continue;
+ if (!S_ISDIR (stbuf.st_mode))
+ continue;
+
+ ret = gf_glusterd_rebalance_move_data (volinfo,
+ full_path);
+ if (ret)
+ break;
+ }
+ closedir (fd);
+
+ if (!entry)
+ ret = 0;
+out:
+ return ret;
+}
+
+int
+gf_glusterd_rebalance_fix_layout (glusterd_volinfo_t *volinfo, const char *dir)
+{
+ int ret = -1;
+ char value[128] = {0,};
+ char full_path[1024] = {0,};
+ struct stat stbuf = {0,};
+ DIR *fd = NULL;
+ struct dirent *entry = NULL;
+
+ if (!volinfo->defrag)
+ goto out;
+
+ fd = opendir (dir);
+ if (!fd)
+ goto out;
+
+ while ((entry = readdir (fd))) {
+ if (!entry)
+ break;
+
+ if (!strcmp (entry->d_name, ".") || !strcmp (entry->d_name, ".."))
+ continue;
+
+ snprintf (full_path, 1024, "%s/%s", dir, entry->d_name);
+
+ ret = stat (full_path, &stbuf);
+ if (ret == -1)
+ continue;
+
if (S_ISDIR (stbuf.st_mode)) {
- /* iterate in subdirectories */
- ret = glusterd_check_and_rebalance (volinfo, full_path);
+ /* Fix the layout of the directory */
+ sys_lgetxattr (full_path, "trusted.distribute.fix.layout",
+ &value, 128);
+
+ volinfo->defrag->total_files += 1;
+
+ /* Traverse into subdirectory */
+ ret = gf_glusterd_rebalance_fix_layout (volinfo,
+ full_path);
if (ret)
break;
}
- }
+ if (volinfo->defrag_status == GF_DEFRAG_STATUS_STOPED) {
+ closedir (fd);
+ ret = -1;
+ goto out;
+ }
+ }
closedir (fd);
if (!entry)
ret = 0;
+
out:
return ret;
}
@@ -207,19 +260,33 @@ glusterd_defrag_start (void *data)
}
/* Fix the root ('/') first */
- getxattr (defrag->mount, "trusted.distribute.fix.layout", &value, 128);
+ sys_lgetxattr (defrag->mount, "trusted.distribute.fix.layout",
+ &value, 128);
+
+ /* root's layout got fixed */
+ defrag->total_files = 1;
+
+ /* Step 1: Fix layout of all the directories */
+ ret = gf_glusterd_rebalance_fix_layout (volinfo, defrag->mount);
+ if (ret)
+ goto out;
+
+ /* Completed first step */
+ volinfo->defrag_status = GF_DEFRAG_STATUS_LAYOUT_FIX_COMPLETE;
- ret = glusterd_check_and_rebalance (volinfo, defrag->mount);
+ /* It was used by number of layout fixes on directories */
+ defrag->total_files = 0;
- /* TODO: This should run in a thread, and finish the thread when
- the task is complete. While defrag is running, keep updating
- files */
+ /* Step 2: Iterate over directories to move data */
+ ret = gf_glusterd_rebalance_move_data (volinfo, defrag->mount);
+ /* Completed whole process */
volinfo->defrag_status = GF_DEFRAG_STATUS_COMPLETE;
volinfo->rebalance_files = defrag->total_files;
volinfo->rebalance_data = defrag->total_data;
volinfo->lookedup_files = defrag->num_files_lookedup;
out:
+ volinfo->defrag = NULL;
if (defrag) {
gf_log ("rebalance", GF_LOG_NORMAL, "rebalance on %s complete",
defrag->mount);
@@ -229,7 +296,6 @@ out:
LOCK_DESTROY (&defrag->lock);
GF_FREE (defrag);
}
- volinfo->defrag = NULL;
return NULL;
}
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index bc319cd..5470e77 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -125,6 +125,7 @@ struct gf_defrag_brickinfo_ {
typedef enum gf_defrag_status_ {
GF_DEFRAG_STATUS_NOT_STARTED,
GF_DEFRAG_STATUS_STARTED,
+ GF_DEFRAG_STATUS_LAYOUT_FIX_COMPLETE,
GF_DEFRAG_STATUS_STOPED,
GF_DEFRAG_STATUS_COMPLETE,
GF_DEFRAG_STATUS_FAILED,