import os, sys, string import subprocess num_replica = 2 num_stripe = 4 #Cachesize calculator cache_size = "`grep 'MemTotal' /proc/meminfo | awk '{print $2 * 0.2 / 1024}' | cut -f1 -d.`" class CreateVolfile: def __init__ (self, server_dict, server, transport, transports, options, server_array): self.host_dict = server_dict self.host = server self.volume_name = options.volume_name self.transport = transport self.transports = transports self.gfs_port = options.port self.gfs_ib_port = options.port + 1 self.auth_parameters = options.auth_param self.raid_type = options.raid_type self.ib_devport = options.ib_dev self.num_servers = len (self.host_dict.keys()) self.conf_dir = options.conf_dir self.host_array = server_array self.unused = options.unused self.debug = options.debug def create_mount_volfile (self): raid_type = self.raid_type if self.conf_dir: mount_fd = file ("%s/%s-%s.vol" % (self.conf_dir, str(self.volume_name), str(self.transport)), "w") else: mount_fd = file ("%s-%s.vol" % (str(self.volume_name), str(self.transport)), "w") print "Generating client volfiles.. for transport '%s'" % (self.transport) cmdline = string.join (sys.argv, ' ') mount_fd.write ("## file auto generated by %s (mount.vol)\n" % sys.argv[0]) mount_fd.write ("# Cmd line:\n") mount_fd.write ("# $ %s\n\n" % cmdline) if raid_type is not None: # Used for later usage mount_fd.write ("# RAID %d\n" % raid_type) mount_fd.write ("# TRANSPORT-TYPE %s\n" % self.transport) subvolumes = [] for host in self.host_dict.keys(): i = 1 for exports in self.host_dict[host]: mount_fd.write ("volume %s-%s\n" % (host,i)) mount_fd.write (" type protocol/client\n") mount_fd.write (" option transport-type %s\n" % self.transport) mount_fd.write (" option remote-host %s\n" % host) if self.transport == 'ib-verbs': mount_fd.write (" option transport.ib-verbs.port %d\n" % self.ib_devport) mount_fd.write (" option transport.remote-port %d\n" % self.gfs_ib_port) if self.transport == 'tcp': mount_fd.write (" option transport.socket.nodelay on\n") mount_fd.write (" option transport.remote-port %d\n" % self.gfs_port) mount_fd.write (" option remote-subvolume brick%s\n" % i) mount_fd.write ("end-volume\n\n") i += 1 exportlist = {} for entry in self.host_array: node = entry.split(':')[0] if not exportlist.has_key(node): exportlist[node] = 1 else: exportlist[node] += 1 subvolumes.append(str(node) + '-' + str(exportlist[node])) # Stripe section.. if given if raid_type is 0: max_stripe_idx = len (subvolumes) / num_stripe stripe_idx = 0 index = 0 while index < max_stripe_idx: mount_fd.write ("volume stripe-%d\n" % index) mount_fd.write (" type cluster/stripe\n") if self.unused: mount_fd.write ("# option block-size 128k\n") mount_fd.write ("# option use-xattr no\n") mount_fd.write (" subvolumes %s %s %s %s\n" % (subvolumes[stripe_idx], subvolumes[stripe_idx+1], subvolumes[stripe_idx+2], subvolumes[stripe_idx+3])) mount_fd.write ("end-volume\n\n") stripe_idx += 4 index +=1 # Replicate section if raid_type is 1: max_mirror_idx = len (subvolumes) / num_replica mirror_idx = 0 index = 0 while index < max_mirror_idx: mount_fd.write ("volume mirror-%d\n" % index) mount_fd.write (" type cluster/replicate\n") mount_fd.write (" subvolumes %s %s\n" % (subvolumes[mirror_idx], subvolumes[mirror_idx+1])) mount_fd.write ("end-volume\n\n") mirror_idx += 2 index += 1 # Distribute section if raid_type is 0: subvolumes = [] flag = 0 while flag < index: subvolumes.append ("stripe-%d" % flag) flag += 1 if raid_type is 1: subvolumes = [] flag = 0 while flag < index: subvolumes.append ("mirror-%d" % flag) flag += 1 if len (subvolumes) > 1: mount_fd.write ("volume distribute\n") mount_fd.write (" type cluster/distribute\n") if self.unused: mount_fd.write("# option unhashed-sticky-bit yes # Used for migrating data while adding new nodes\n") mount_fd.write("# option min-free-disk 5% # Minimum free disk available on the volume\n") mount_fd.write (" subvolumes %s\n" % string.join (subvolumes,' ')) mount_fd.write ("end-volume\n\n") subvolumes[0] = "distribute" mount_fd.write ("volume writebehind\n") mount_fd.write (" type performance/write-behind\n") mount_fd.write (" option cache-size 4MB\n") if self.unused: mount_fd.write ("# option enable-trickling-writes yes # Flush final write calls when network is free\n") mount_fd.write ("# option enable-O_SYNC yes # Enable O_SYNC for write-behind\n") mount_fd.write ("# option disable-for-first-nbytes 1 # Disable first nbytes with very small initial writes\n") mount_fd.write (" subvolumes %s\n" % subvolumes[0]) mount_fd.write ("end-volume\n\n") mount_fd.write ("volume readahead\n") mount_fd.write (" type performance/read-ahead\n") mount_fd.write (" option page-count 4\n") if self.unused: mount_fd.write ("# option force-atime-update yes # force updating atimes, default off\n") mount_fd.write (" subvolumes writebehind\n") mount_fd.write ("end-volume\n\n") mount_fd.write ("volume iocache\n") mount_fd.write (" type performance/io-cache\n") mount_fd.write (" option cache-size %sMB\n" % cache_size) mount_fd.write (" option cache-timeout 1\n") if self.unused: mount_fd.write ("# option priority *.html:1,abc*:2 # Priority list for iocaching files\n") mount_fd.write (" subvolumes readahead\n") mount_fd.write ("end-volume\n\n") mount_fd.write ("volume quickread\n") mount_fd.write (" type performance/quick-read\n") mount_fd.write (" option cache-timeout 1\n") mount_fd.write (" option max-file-size 64kB\n") mount_fd.write (" subvolumes iocache\n") mount_fd.write ("end-volume\n\n") mount_fd.write ("volume statprefetch\n") mount_fd.write (" type performance/stat-prefetch\n") mount_fd.write (" subvolumes quickread\n") mount_fd.write ("end-volume\n\n") return def create_export_volfile (self): cmdline = string.join (sys.argv, ' ') if self.conf_dir: exp_fd = file ("%s/%s-export.vol" % (self.conf_dir, str(self.host + '-' + self.volume_name)),"w") else: exp_fd = file ("%s-export.vol" % (str(self.host + '-' + self.volume_name)),"w") print "Generating server volfiles.. for server '%s'" % (self.host) exp_fd.write ("## file auto generated by %s (export.vol)\n" % sys.argv[0]) exp_fd.write ("# Cmd line:\n") exp_fd.write ("# $ %s\n\n" % cmdline) total_bricks = [] i=1 for export in self.host_dict[self.host]: exp_fd.write ("volume posix%d\n" % i) exp_fd.write (" type storage/posix\n") if self.unused: exp_fd.write("# option o-direct enable # (default: disable) boolean type only\n") exp_fd.write("# option export-statfs-size no # (default: yes) boolean type only\n") exp_fd.write("# option mandate-attribute off # (default: on) boolean type only\n") exp_fd.write("# option span-devices 8 # (default: 0) integer value\n") exp_fd.write("# option background-unlink yes # (default: no) boolean type\n") exp_fd.write (" option directory %s\n" % export) exp_fd.write ("end-volume\n\n") exp_fd.write ("volume locks%d\n" % i) exp_fd.write (" type features/locks\n") if self.unused: exp_fd.write ("# option mandatory on # Default off, used in specific applications\n") exp_fd.write (" subvolumes posix%d\n" % i) exp_fd.write ("end-volume\n\n") exp_fd.write ("volume brick%d\n" % i) exp_fd.write (" type performance/io-threads\n") exp_fd.write (" option thread-count 8\n") if self.unused: exp_fd.write ("# option autoscaling yes # Heuristic for autoscaling threads on demand\n") exp_fd.write ("# option min-threads 2 # min count for thread pool\n") exp_fd.write ("# option max-threads 64 # max count for thread pool\n") exp_fd.write (" subvolumes locks%d\n" % i) exp_fd.write ("end-volume\n\n") total_bricks.append("brick%s" % i) i += 1 for transport in self.transports: exp_fd.write ("volume server-%s\n" % transport) exp_fd.write (" type protocol/server\n") exp_fd.write (" option transport-type %s\n" % transport) for brick in total_bricks: exp_fd.write (" option auth.addr.%s.allow %s\n" % (brick, self.auth_parameters)) if transport == 'ib-verbs': exp_fd.write (" option transport.ib-verbs.listen-port %d\n" % self.gfs_ib_port) exp_fd.write (" option transport.ib-verbs.port %d\n" % self.ib_devport) if transport == 'tcp': exp_fd.write (" option transport.socket.listen-port %d\n" % self.gfs_port) exp_fd.write (" option transport.socket.nodelay on\n") exp_fd.write (" subvolumes %s\n" % string.join(total_bricks, ' ')) exp_fd.write ("end-volume\n\n") return