From c2ea4463ab4ce04936a824f7e8c7c133aabe1381 Mon Sep 17 00:00:00 2001 From: Susant Palai Date: Tue, 11 Apr 2017 17:27:17 +0530 Subject: cluster/dht: Make rebalance honor min-free-disk MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit test: Manual created files of size 1K on 2 brick(of size 1GB) setup . added a brick of size 16GB. set min-free-disk to 12GB(so that first two bricks won't receive any files). removed one of the 1st brick of size 1GB. Logs from test: [2017-04-12 08:52:08.196484] W [MSGID: 0] [dht-rebalance.c:895:__dht_check_free_space] 0-test1-dht: Write will cross min-free-disk for file - /tile32 on subvol - test1-client-1. Looking for new subvol. [2017-04-12 08:52:08.196904] I [MSGID: 0] [dht-rebalance.c:925:__dht_check_free_space] 0-test1-dht: new target found - test1-client-2 for file - /tile32 - Post migration we have two files. The new destination (/brick/1) has the data file [root@vm1 ~]# ll /brick/1/tile32 -rw-r--r--. 2 root root 0 Apr 12 14:22 /brick/1/tile32 - On the old target the linkto file is there with linkto xattr pointing to /brick/1 [root@vm1 ~]# ll /tmp/2/tile32 ---------T. 2 root root 1000 Apr 12 14:22 /tmp/2/tile32 [root@vm1 ~]# getfattr -m . -de text /tmp/2/tile32 getfattr: Removing leading '/' from absolute path names security.selinux="unconfined_u:object_r:user_tmp_t:s0" trusted.gfid="����:Aс�#�/'b2" trusted.glusterfs.dht.linkto="test1-client-2" Marking ./tests/features/worm_sh.t as bad test. Reason being, this patch failed on master branch as well and it has nothing to do with rebalance/remove-brick. BUG: 1441508 Change-Id: I90bae251cda3d957a49cdceda90cd08311a392fb Signed-off-by: Susant Palai Reviewed-on: https://review.gluster.org/17034 Smoke: Gluster Build System NetBSD-regression: NetBSD Build System Reviewed-by: Amar Tumballi Reviewed-by: Raghavendra G CentOS-regression: Gluster Build System --- xlators/cluster/dht/src/dht-rebalance.c | 215 ++++++++++++++++++++++++++++++-- 1 file changed, 202 insertions(+), 13 deletions(-) (limited to 'xlators/cluster/dht/src/dht-rebalance.c') diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c index 84081fdaa13..d963cfb2b8f 100644 --- a/xlators/cluster/dht/src/dht-rebalance.c +++ b/xlators/cluster/dht/src/dht-rebalance.c @@ -707,12 +707,29 @@ __dht_rebalance_create_dst_file (xlator_t *to, xlator_t *from, loc_t *loc, struc "%s: failed to set xattr on %s (%s)", loc->path, to->name, strerror (-ret)); + + /* TODO: Need to add a detailed comment about why we moved away from + ftruncate. + ret = syncop_ftruncate (to, fd, stbuf->ia_size, NULL, NULL); if (ret < 0) gf_msg (this->name, GF_LOG_ERROR, 0, DHT_MSG_MIGRATE_FILE_FAILED, "ftruncate failed for %s on %s (%s)", loc->path, to->name, strerror (-ret)); + */ + + /* Fallocate does not work for size 0, hence the check. Anyway we don't + * need to care about min-free-disk for 0 byte size file */ + if (stbuf->ia_size > 0) { + ret = syncop_fallocate (to, fd, 0, 0, stbuf->ia_size, NULL, + NULL); + if (ret < 0) + gf_msg (this->name, GF_LOG_ERROR, 0, + DHT_MSG_MIGRATE_FILE_FAILED, + "fallocate failed for %s on %s (%s)", + loc->path, to->name, strerror (-ret)); + } ret = syncop_fsetattr (to, fd, stbuf, (GF_SET_ATTR_UID | GF_SET_ATTR_GID), @@ -743,16 +760,19 @@ out: static int __dht_check_free_space (xlator_t *to, xlator_t *from, loc_t *loc, - struct iatt *stbuf, int flag) + struct iatt *stbuf, int flag, dht_conf_t *conf, + gf_boolean_t *target_changed, xlator_t **new_subvol) { struct statvfs src_statfs = {0,}; struct statvfs dst_statfs = {0,}; int ret = -1; xlator_t *this = NULL; dict_t *xdata = NULL; - + dht_layout_t *layout = NULL; uint64_t src_statfs_blocks = 1; uint64_t dst_statfs_blocks = 1; + double post_availspace = 0; + double post_percent = 0; this = THIS; @@ -794,6 +814,10 @@ __dht_check_free_space (xlator_t *to, xlator_t *from, loc_t *loc, goto out; } + gf_msg_debug (this->name, 0, "min_free_disk - %f , block available - %lu ," + " block size - %lu ", conf->min_free_disk, dst_statfs.f_bavail, + dst_statfs.f_bsize); + /* if force option is given, do not check for space @ dst. * Check only if space is avail for the file */ if (flag != GF_DHT_MIGRATE_DATA) @@ -832,16 +856,64 @@ __dht_check_free_space (xlator_t *to, xlator_t *from, loc_t *loc, goto out; } } + + check_avail_space: - if (((dst_statfs.f_bavail * dst_statfs.f_bsize) / - GF_DISK_SECTOR_SIZE) < stbuf->ia_blocks) { - gf_msg (this->name, GF_LOG_ERROR, 0, - DHT_MSG_MIGRATE_FILE_FAILED, - "data movement attempted from node (%s) to node (%s) " - "which does not have required free space for (%s)", - from->name, to->name, loc->path); + + if (conf->disk_unit == 'p' && dst_statfs.f_blocks) { + post_availspace = (dst_statfs.f_bavail * dst_statfs.f_frsize) - stbuf->ia_size; + post_percent = (post_availspace * 100) / (dst_statfs.f_blocks * dst_statfs.f_frsize); + if (post_percent < conf->min_free_disk) { + gf_msg (this->name, GF_LOG_WARNING, 0, 0, + "Write will cross min-free-disk for " + "file - %s on subvol - %s. Looking " + "for new subvol", loc->path, to->name); + + goto find_new_subvol; + } else { + ret = 0; + goto out; + } + } + + if (conf->disk_unit != 'p' && + ((dst_statfs.f_bavail * dst_statfs.f_frsize) - stbuf->ia_size) < conf->min_free_disk) { + gf_msg (this->name, GF_LOG_WARNING, 0, 0, "Write will cross " + "min-free-disk for file - %s on subvol - %s. Looking " + "for new subvol", loc->path, to->name); + + goto find_new_subvol; + } else { + ret = 0; + goto out; + } + + +find_new_subvol: + layout = dht_layout_get (this, loc->parent); + if (!layout) { + gf_log (this->name, GF_LOG_ERROR, "Layout is NULL"); + ret = -1; + goto out; + } + + *new_subvol = dht_subvol_with_free_space_inodes (this, to, + layout, stbuf->ia_size); + if (!(*new_subvol)) { + gf_msg (this->name, GF_LOG_WARNING, 0, + DHT_MSG_SUBVOL_INSUFF_SPACE, "Could not find any subvol" + " with space accomodating the file. Consider adding " + "bricks"); + + *target_changed = _gf_false; ret = -1; goto out; + } else { + gf_msg (this->name, GF_LOG_INFO, 0, 0, "new target found - %s" + " for file - %s", (*new_subvol)->name, loc->path); + *target_changed = _gf_true; + ret = 0; + goto out; } ret = 0; @@ -1307,6 +1379,9 @@ dht_migrate_file (xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to, lock_migration_info_t locklist; dict_t *meta_dict = NULL; gf_boolean_t meta_locked = _gf_false; + gf_boolean_t target_changed = _gf_false; + xlator_t *new_target = NULL; + xlator_t *old_target = NULL; defrag = conf->defrag; if (!defrag) @@ -1416,12 +1491,57 @@ dht_migrate_file (xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to, /* create the destination, with required modes/xattr */ ret = __dht_rebalance_create_dst_file (to, from, loc, &stbuf, &dst_fd, xattr); - if (ret) + if (ret) { + gf_msg (this->name, GF_LOG_ERROR, 0, 0, "Create dst failed" + " on - %s for file - %s", to->name, loc->path); goto out; + } clean_dst = _gf_true; - ret = __dht_check_free_space (to, from, loc, &stbuf, flag); + ret = __dht_check_free_space (to, from, loc, &stbuf, flag, conf, + &target_changed, &new_target); + if (target_changed) { + /* Can't handle for hardlinks. Marking this as failure */ + if (flag == GF_DHT_MIGRATE_HARDLINK_IN_PROGRESS || stbuf.ia_nlink > 1) { + gf_msg (this->name, GF_LOG_ERROR, 0, + DHT_MSG_SUBVOL_INSUFF_SPACE, "Exiting migration for" + " file - %s. flag - %d, stbuf.ia_nlink - %d", + loc->path, flag, stbuf.ia_nlink); + ret = -1; + goto out; + } + + + ret = syncop_ftruncate (to, dst_fd, 0, NULL, NULL); + if (ret) { + gf_log (this->name, GF_LOG_WARNING, + "%s: failed to perform truncate on %s (%s)", + loc->path, to->name, strerror (-ret)); + ret = -1; + } + + syncop_close (dst_fd); + + old_target = to; + to = new_target; + + /* if the file migration is successful to this new target, then + * update the xattr on the old destination to point the new + * destination. We need to do update this only post migration + * as in case of failure the linkto needs to point to the source + * subvol */ + ret = __dht_rebalance_create_dst_file (to, from, loc, &stbuf, + &dst_fd, xattr); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, "Create dst failed" + " on - %s for file - %s", to->name, loc->path); + goto out; + } else { + gf_msg (this->name, GF_LOG_INFO, 0, 0, "destination for file " + "- %s is changed to - %s", loc->path, to->name); + } + } if (ret) { goto out; @@ -1651,6 +1771,36 @@ dht_migrate_file (xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to, ret = -1; } + if (target_changed) { + if (!dict) { + dict = dict_new (); + if (!dict) { + ret = -1; + goto out; + } + } else { + dict_del (dict, conf->link_xattr_name); + dict_del (dict, GLUSTERFS_POSIXLK_COUNT); + ret = dict_set_str (dict, conf->link_xattr_name, to->name); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "failed to set xattr in dict for %s (linkto:%s)", + loc->path, to->name); + ret = -1; + goto out; + } + + ret = syncop_setxattr (old_target, loc, dict, 0, NULL, NULL); + if (ret) { + gf_msg (this->name, GF_LOG_ERROR, 0, + DHT_MSG_MIGRATE_FILE_FAILED, + "failed to set xattr on %s in %s (%s)", + loc->path, old_target->name, strerror (-ret)); + ret = -1; + goto out; + } + } + } clean_dst = _gf_false; @@ -2115,6 +2265,8 @@ gf_defrag_migrate_single_file (void *opaque) inode_t *inode = NULL; xlator_t *hashed_subvol = NULL; xlator_t *cached_subvol = NULL; + call_frame_t *statfs_frame = NULL; + xlator_t *old_THIS = NULL; rebal_entry = (struct dht_container *)opaque; if (!rebal_entry) { @@ -2213,6 +2365,20 @@ gf_defrag_migrate_single_file (void *opaque) /* use the inode returned by inode_link */ entry_loc.inode = inode; + old_THIS = THIS; + THIS = this; + statfs_frame = create_frame (this, this->ctx->pool); + if (!statfs_frame) { + gf_msg (this->name, GF_LOG_ERROR, DHT_MSG_NO_MEMORY, ENOMEM, + "Insufficient memory. Frame creation failed"); + ret = -1; + goto out; + } + + /* async statfs information for honoring min-free-disk */ + dht_get_du_info (statfs_frame, this, loc); + THIS = old_THIS; + ret = syncop_setxattr (this, &entry_loc, migrate_data, 0, NULL, NULL); if (ret < 0) { op_errno = -ret; @@ -2291,6 +2457,10 @@ gf_defrag_migrate_single_file (void *opaque) } out: + if (statfs_frame) { + STACK_DESTROY (statfs_frame->root); + } + loc_wipe (&entry_loc); return ret; @@ -2551,7 +2721,7 @@ gf_defrag_get_entry (xlator_t *this, int i, struct dht_container **container, continue; } - /*Build Container Structure */ + /*Build Container Structure */ tmp_container = GF_CALLOC (1, sizeof(struct dht_container), gf_dht_mt_container_t); @@ -3670,7 +3840,8 @@ gf_defrag_start_crawl (void *data) int thread_spawn_count = 0; pthread_t *tid = NULL; gf_boolean_t is_tier_detach = _gf_false; - + call_frame_t *statfs_frame = NULL; + xlator_t *old_THIS = NULL; this = data; if (!this) @@ -3707,6 +3878,21 @@ gf_defrag_start_crawl (void *data) goto out; } + old_THIS = THIS; + THIS = this; + + statfs_frame = create_frame (this, this->ctx->pool); + if (!statfs_frame) { + gf_msg (this->name, GF_LOG_ERROR, DHT_MSG_NO_MEMORY, ENOMEM, + "Insufficient memory. Frame creation failed"); + ret = -1; + goto out; + } + + /* async statfs update for honoring min-free-disk */ + dht_get_du_info (statfs_frame, this, &loc); + THIS = old_THIS; + fix_layout = dict_new (); if (!fix_layout) { ret = -1; @@ -3976,6 +4162,9 @@ out: if (migrate_data) dict_unref (migrate_data); + if (statfs_frame) { + STACK_DESTROY (statfs_frame->root); + } exit: return ret; } -- cgit