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+##
+# Sample ceph ceph.conf file.
+##
+# This file defines cluster membership, the various locations
+# that Ceph stores data, and any other runtime options.
+
+# If a 'host' is defined for a daemon, the init.d start/stop script will
+# verify that it matches the hostname (or else ignore it).  If it is
+# not defined, it is assumed that the daemon is intended to start on
+# the current host (e.g., in a setup with a startup.conf on each
+# node).
+
+## Metavariables
+# $cluster    ; Expands to the Ceph Storage Cluster name. Useful
+#             ; when running multiple Ceph Storage Clusters
+#             ; on the same hardware.
+#             ; Example: /etc/ceph/$cluster.keyring
+#             ; (Default: ceph)
+#
+# $type       ; Expands to one of mds, osd, or mon, depending on
+#             ; the type of the instant daemon.
+#             ; Example: /var/lib/ceph/$type
+#
+# $id         ; Expands to the daemon identifier. For osd.0, this
+#             ; would be 0; for mds.a, it would be a.
+#             ; Example: /var/lib/ceph/$type/$cluster-$id
+#
+# $host       ; Expands to the host name of the instant daemon.
+#
+# $name       ; Expands to $type.$id.
+#             ; Example: /var/run/ceph/$cluster-$name.asok
+
+[global]
+### http://docs.ceph.com/docs/master/rados/configuration/general-config-ref/
+
+    ;fsid                       = {UUID}    # use `uuidgen` to generate your own UUID
+    ;public network             = 192.168.0.0/24
+    ;cluster network            = 192.168.0.0/24
+
+    # Each running Ceph daemon has a running process identifier (PID) file.
+    # The PID file is generated upon start-up.
+    # Type: String (optional)
+    # (Default: N/A). The default path is /var/run/$cluster/$name.pid.
+    pid file                   = /var/run/ceph/$name.pid
+
+    # If set, when the Ceph Storage Cluster starts, Ceph sets the max open fds
+    # at the OS level (i.e., the max # of file descriptors).
+    # It helps prevents Ceph OSD Daemons from running out of file descriptors.
+    # Type: 64-bit Integer (optional)
+    # (Default: 0)
+    ;max open files             = 131072
+
+
+### http://docs.ceph.com/docs/master/rados/operations/
+### http://docs.ceph.com/docs/master/rados/configuration/auth-config-ref/
+
+    # If enabled, the Ceph Storage Cluster daemons (i.e., ceph-mon, ceph-osd,
+    # and ceph-mds) must authenticate with each other.
+    # Type: String (optional); Valid settings are "cephx" or "none".
+    # (Default: cephx)
+    auth cluster required      = cephx
+
+    # If enabled, the Ceph Storage Cluster daemons require Ceph Clients to
+    # authenticate with the Ceph Storage Cluster in order to access Ceph
+    # services.
+    # Type: String (optional); Valid settings are "cephx" or "none".
+    # (Default: cephx)
+    auth service required      = cephx
+
+    # If enabled, the Ceph Client requires the Ceph Storage Cluster to
+    # authenticate with the Ceph Client.
+    # Type: String (optional); Valid settings are "cephx" or "none".
+    # (Default: cephx)
+    auth client required       = cephx
+
+    # If set to true, Ceph requires signatures on all message traffic between
+    # the Ceph Client and the Ceph Storage Cluster, and between daemons
+    # comprising the Ceph Storage Cluster.
+    # Type: Boolean (optional)
+    # (Default: false)
+    ;cephx require signatures   = true
+
+    # kernel RBD client do not support authentication yet:
+    cephx cluster require signatures = true
+    cephx service require signatures = false
+
+    # The path to the keyring file.
+    # Type: String (optional)
+    # Default: /etc/ceph/$cluster.$name.keyring,/etc/ceph/$cluster.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin
+    ;keyring                  = /etc/ceph/$cluster.$name.keyring
+
+
+### http://docs.ceph.com/docs/master/rados/configuration/pool-pg-config-ref/
+
+
+    ## Replication level, number of data copies.
+    # Type: 32-bit Integer
+    # (Default: 3)
+    ;osd pool default size      = 3
+
+    ## Replication level in degraded state, less than 'osd pool default size' value.
+    # Sets the minimum number of written replicas for objects in the
+    # pool in order to acknowledge a write operation to the client. If
+    # minimum is not met, Ceph will not acknowledge the write to the
+    # client. This setting ensures a minimum number of replicas when
+    # operating in degraded mode.
+    # Type: 32-bit Integer
+    # (Default: 0), which means no particular minimum. If 0, minimum is size - (size / 2).
+    ;osd pool default min size  = 2
+
+    ## Ensure you have a realistic number of placement groups. We recommend
+    ## approximately 100 per OSD. E.g., total number of OSDs multiplied by 100
+    ## divided by the number of replicas (i.e., osd pool default size). So for
+    ## 10 OSDs and osd pool default size = 3, we'd recommend approximately
+    ## (100 * 10) / 3 = 333
+
+    # Description: The default number of placement groups for a pool. The
+    #              default value is the same as pg_num with mkpool.
+    # Type: 32-bit Integer
+    # (Default: 8)
+    ;osd pool default pg num    = 128
+
+    # Description: The default number of placement groups for placement for a
+    #              pool. The default value is the same as pgp_num with mkpool.
+    #              PG and PGP should be equal (for now).
+    # Type: 32-bit Integer
+    # (Default: 8)
+    ;osd pool default pgp num   = 128
+
+    # The default CRUSH ruleset to use when creating a pool
+    # Type: 32-bit Integer
+    # (Default: 0)
+    ;osd pool default crush rule = 0
+
+    # The bucket type to use for chooseleaf in a CRUSH rule.
+    # Uses ordinal rank rather than name.
+    # Type: 32-bit Integer
+    # (Default: 1) Typically a host containing one or more Ceph OSD Daemons.
+    ;osd crush chooseleaf type = 1
+
+
+### http://docs.ceph.com/docs/master/rados/troubleshooting/log-and-debug/
+
+    # The location of the logging file for your cluster.
+    # Type: String
+    # Required: No
+    # Default: /var/log/ceph/$cluster-$name.log
+    ;log file                   = /var/log/ceph/$cluster-$name.log
+
+    # Determines if logging messages should appear in syslog.
+    # Type: Boolean
+    # Required: No
+    # (Default: false)
+    ;log to syslog              = true
+
+
+### http://docs.ceph.com/docs/master/rados/configuration/ms-ref/
+
+    # Enable if you want your daemons to bind to IPv6 address instead of
+    # IPv4 ones. (Not required if you specify a daemon or cluster IP.)
+    # Type: Boolean
+    # (Default: false)
+    ;ms bind ipv6               = true
+
+##################
+## Monitors
+## You need at least one. You need at least three if you want to
+## tolerate any node failures. Always create an odd number.
+[mon]
+### http://docs.ceph.com/docs/master/rados/configuration/mon-config-ref/
+### http://docs.ceph.com/docs/master/rados/configuration/mon-osd-interaction/
+
+    # The IDs of initial monitors in a cluster during startup.
+    # If specified, Ceph requires an odd number of monitors to form an
+    # initial quorum (e.g., 3).
+    # Type: String
+    # (Default: None)
+    ;mon initial members        = mycephhost
+
+    ;mon host                   = cephhost01,cephhost02
+    ;mon addr                   = 192.168.0.101,192.168.0.102
+
+    # The monitor's data location
+    # Default: /var/lib/ceph/mon/$cluster-$id
+    ;mon data                   = /var/lib/ceph/mon/$name
+
+    # The clock drift in seconds allowed between monitors.
+    # Type: Float
+    # (Default: .050)
+    ;mon clock drift allowed    = .15
+
+    # Exponential backoff for clock drift warnings
+    # Type: Float
+    # (Default: 5)
+    ;mon clock drift warn backoff = 30    # Tell the monitor to backoff from this warning for 30 seconds
+
+    # The percentage of disk space used before an OSD is considered full.
+    # Type: Float
+    # (Default: .95)
+    ;mon osd full ratio         = .95
+
+    # The percentage of disk space used before an OSD is considered nearfull.
+    # Type: Float
+    # (Default: .85)
+    ;mon osd nearfull ratio     = .85
+
+    # The number of seconds Ceph waits before marking a Ceph OSD
+    # Daemon "down" and "out" if it doesn't respond.
+    # Type: 32-bit Integer
+    # (Default: 600)
+    ;mon osd down out interval  = 600
+
+    # The grace period in seconds before declaring unresponsive Ceph OSD
+    # Daemons "down".
+    # Type: 32-bit Integer
+    # (Default: 900)
+    ;mon osd report timeout          = 300
+
+### http://docs.ceph.com/docs/master/rados/troubleshooting/log-and-debug/
+
+    # logging, for debugging monitor crashes, in order of
+    # their likelihood of being helpful :)
+    ;debug ms                   = 1
+    ;debug mon                  = 20
+    ;debug paxos                = 20
+    ;debug auth                 = 20
+
+
+;[mon.alpha]
+;    host                       = alpha
+;    mon addr                   = 192.168.0.10:6789
+
+;[mon.beta]
+;    host                       = beta
+;    mon addr                   = 192.168.0.11:6789
+
+;[mon.gamma]
+;    host                       = gamma
+;    mon addr                   = 192.168.0.12:6789
+
+
+##################
+## Metadata servers
+# You must deploy at least one metadata server to use CephFS. There is
+# experimental support for running multiple metadata servers. Do not run
+# multiple metadata servers in production.
+[mds]
+### http://docs.ceph.com/docs/master/cephfs/mds-config-ref/
+
+    # where the mds keeps it's secret encryption keys
+    ;keyring                    = /var/lib/ceph/mds/$name/keyring
+
+    # Determines whether a 'ceph-mds' daemon should poll and
+    # replay the log of an active MDS (hot standby).
+    # Type:  Boolean
+    # (Default: false)
+    ;mds standby replay          = true
+
+    ; mds logging to debug issues.
+    ;debug ms                   = 1
+    ;debug mds                  = 20
+    ;debug journaler            = 20
+
+    # The number of inodes to cache.
+    # Type: 32-bit Integer
+    # (Default: 100000)
+    ;mds cache size             = 250000
+
+;[mds.alpha]
+;    host                       = alpha
+
+;[mds.beta]
+;    host                       = beta
+
+##################
+## osd
+# You need at least one.  Two or more if you want data to be replicated.
+# Define as many as you like.
+[osd]
+### http://docs.ceph.com/docs/master/rados/configuration/osd-config-ref/
+
+    # The path to the OSDs data.
+    # You must create the directory when deploying Ceph.
+    # You should mount a drive for OSD data at this mount point.
+    # We do not recommend changing the default.
+    # Type: String
+    # Default: /var/lib/ceph/osd/$cluster-$id
+    ;osd data                     = /var/lib/ceph/osd/$name
+
+    ## You can change the number of recovery operations to speed up recovery
+    ## or slow it down if your machines can't handle it
+
+    # The number of active recovery requests per OSD at one time.
+    # More requests will accelerate recovery, but the requests
+    # places an increased load on the cluster.
+    # Type: 32-bit Integer
+    # (Default: 5)
+    ;osd recovery max active      = 3
+
+    # The maximum number of backfills allowed to or from a single OSD.
+    # Type: 64-bit Integer
+    # (Default: 10)
+    ;osd max backfills            = 5
+
+    # The maximum number of simultaneous scrub operations for a Ceph OSD Daemon.
+    # Type: 32-bit Int
+    # (Default: 1)
+    ;osd max scrubs               = 2
+
+    # You may add settings for ceph-deploy so that it will create and mount
+    # the correct type of file system. Remove the comment `#` character for
+    # the following settings and replace the values in parenthesis
+    # with appropriate values, or leave the following settings commented
+    # out to accept the default values.
+
+    #osd mkfs type = {fs-type}
+    #osd mkfs options {fs-type}   = {mkfs options}   # default for xfs is "-f"
+    #osd mount options {fs-type}  = {mount options} # default mount option is "rw, noatime"
+    ;osd mkfs type                = btrfs
+    ;osd mount options btrfs      = noatime,nodiratime
+
+    ## Ideally, make this a separate disk or partition.  A few
+    ## hundred MB should be enough; more if you have fast or many
+    ## disks.  You can use a file under the osd data dir if need be
+    ## (e.g. /data/$name/journal), but it will be slower than a
+    ## separate disk or partition.
+    # The path to the OSD's journal. This may be a path to a file or a block
+    # device (such as a partition of an SSD). If it is a file, you must
+    # create the directory to contain it.
+    # We recommend using a drive separate from the osd data drive.
+    # Type: String
+    # Default: /var/lib/ceph/osd/$cluster-$id/journal
+    ;osd journal                  = /var/lib/ceph/osd/$name/journal
+
+    # Check log files for corruption. Can be computationally expensive.
+    # Type: Boolean
+    # (Default: false)
+    ;osd check for log corruption = true
+
+### http://docs.ceph.com/docs/master/rados/configuration/journal-ref/
+
+    # The size of the journal in megabytes. If this is 0,
+    # and the journal is a block device, the entire block device is used.
+    # Since v0.54, this is ignored if the journal is a block device,
+    # and the entire block device is used.
+    # Type: 32-bit Integer
+    # (Default: 5120)
+    # Recommended: Begin with 1GB. Should be at least twice the product
+    # of the expected speed multiplied by "filestore max sync interval".
+    ;osd journal size             = 2048     ; journal size, in megabytes
+
+    ## If you want to run the journal on a tmpfs, disable DirectIO
+    # Enables direct i/o to the journal.
+    # Requires "journal block align" set to "true".
+    # Type: Boolean
+    # Required: Yes when using aio.
+    # (Default: true)
+    ;journal dio                  = false
+
+    # osd logging to debug osd issues, in order of likelihood of being helpful
+    ;debug ms                     = 1
+    ;debug osd                    = 20
+    ;debug filestore              = 20
+    ;debug journal                = 20
+
+### http://docs.ceph.com/docs/master/rados/configuration/filestore-config-ref/
+
+    # The maximum interval in seconds for synchronizing the filestore.
+    # Type: Double (optional)
+    # (Default: 5)
+    ;filestore max sync interval = 5
+
+    # Enable snapshots for a btrfs filestore.
+    # Type: Boolean
+    # Required: No. Only used for btrfs.
+    # (Default: true)
+    ;filestore btrfs snap        = false
+
+    # Enables the filestore flusher.
+    # Type: Boolean
+    # Required: No
+    # (Default: false)
+    ;filestore flusher            = true
+
+    # Defines the maximum number of in progress operations the file store
+    # accepts before blocking on queuing new operations.
+    # Type: Integer
+    # Required: No. Minimal impact on performance.
+    # (Default: 500)
+    ;filestore queue max ops      = 500
+
+    ## Filestore and OSD settings can be tweak to achieve better performance
+
+### http://docs.ceph.com/docs/master/rados/configuration/filestore-config-ref/#misc
+
+    # Min number of files in a subdir before merging into parent NOTE: A negative value means to disable subdir merging
+    # Type: Integer
+    # Required: No
+    # Default:  10
+    ;filestore merge threshold    = 10
+
+    # filestore_split_multiple * abs(filestore_merge_threshold) * 16 is the maximum number of files in a subdirectory before splitting into child directories.
+    # Type: Integer
+    # Required: No
+    # Default:  2
+    ;filestore split multiple     = 2
+
+    # The number of filesystem operation threads that execute in parallel.
+    # Type: Integer
+    # Required: No
+    # Default:  2
+    ;filestore op threads         = 4
+
+    # The number of threads to service Ceph OSD Daemon operations. Set to 0 to disable it. Increasing the number may increase the request processing rate.
+    # Type: 32-bit Integer
+    # Default:  2
+    ;osd op threads               = 2
+
+    ## CRUSH
+
+    # By default OSDs update their details (location, weight and root) on the CRUSH map during startup
+    # Type: Boolean
+    # Required: No;
+    # (Default: true)
+    ;osd crush update on start    = false
+
+;[osd.0]
+;    host                         = delta
+
+;[osd.1]
+;    host                         = epsilon
+
+;[osd.2]
+;    host                         = zeta
+
+;[osd.3]
+;    host                         = eta
+
+
+##################
+## client settings
+[client]
+
+### http://docs.ceph.com/docs/master/rbd/rbd-config-ref/
+
+    # Enable caching for RADOS Block Device (RBD).
+    # Type: Boolean
+    # Required: No
+    # (Default: true)
+    rbd cache                           = true
+
+    # The RBD cache size in bytes.
+    # Type: 64-bit Integer
+    # Required: No
+    # (Default: 32 MiB)
+    ;rbd cache size                     = 33554432
+
+    # The dirty limit in bytes at which the cache triggers write-back.
+    # If 0, uses write-through caching.
+    # Type: 64-bit Integer
+    # Required: No
+    # Constraint: Must be less than rbd cache size.
+    # (Default: 24 MiB)
+    ;rbd cache max dirty                = 25165824
+
+    # The dirty target before the cache begins writing data to the data storage.
+    # Does not block writes to the cache.
+    # Type: 64-bit Integer
+    # Required: No
+    # Constraint: Must be less than rbd cache max dirty.
+    # (Default: 16 MiB)
+    ;rbd cache target dirty             = 16777216
+
+    # The number of seconds dirty data is in the cache before writeback starts.
+    # Type: Float
+    # Required: No
+    # (Default: 1.0)
+    ;rbd cache max dirty age            = 1.0
+
+    # Start out in write-through mode, and switch to write-back after the
+    # first flush request is received. Enabling this is a conservative but
+    # safe setting in case VMs running on rbd are too old to send flushes,
+    # like the virtio driver in Linux before 2.6.32.
+    # Type: Boolean
+    # Required: No
+    # (Default: true)
+    ;rbd cache writethrough until flush = true
+
+    # The Ceph admin socket allows you to query a daemon via a socket interface
+    # From a client perspective this can be a virtual machine using librbd
+    # Type: String
+    # Required: No
+    ;admin socket                       = /var/run/ceph/$cluster-$type.$id.$pid.$cctid.asok
+
+
+##################
+## radosgw client settings
+[client.radosgw.gateway]
+
+### http://docs.ceph.com/docs/master/radosgw/config-ref/
+
+    # Sets the location of the data files for Ceph Object Gateway.
+    # You must create the directory when deploying Ceph.
+    # We do not recommend changing the default.
+    # Type: String
+    # Default: /var/lib/ceph/radosgw/$cluster-$id
+    ;rgw data                     = /var/lib/ceph/radosgw/$name
+
+    # Client's hostname
+    ;host                         =  ceph-radosgw
+
+    # where the radosgw keeps it's secret encryption keys
+    ;keyring                      = /etc/ceph/ceph.client.radosgw.keyring
+
+    # FastCgiExternalServer uses this socket.
+    # If you do not specify a socket path, Ceph Object Gateway will not run as an external server.
+    # The path you specify here must be the same as the path specified in the rgw.conf file.
+    # Type: String
+    # Default: None
+    ;rgw socket path              = /var/run/ceph/ceph.radosgw.gateway.fastcgi.sock
+
+    # The location of the logging file for your radosgw.
+    # Type: String
+    # Required: No
+    # Default: /var/log/ceph/$cluster-$name.log
+    ;log file                     = /var/log/ceph/client.radosgw.gateway.log
+
+    # Enable 100-continue if it is operational.
+    # Type: Boolean
+    # Default:  true
+    ;rgw print continue           = false
+
+    # The DNS name of the served domain.
+    # Type: String
+    # Default:  None
+    ;rgw dns name                 = radosgw.ceph.internal