- NDB Cluster软件版本
config.ini建议使用以下文件来配置运行NDB Cluster 8.0的集群：
# TCP PARAMETERS [tcp default]SendBufferMemory=2M ReceiveBufferMemory=2M # Increasing the sizes of these 2 buffers beyond the default values # helps prevent bottlenecks due to slow disk I/O. # MANAGEMENT NODE PARAMETERS [ndb_mgmd default] DataDir=path/to/management/server/data/directory # It is possible to use a different data directory for each management # server, but for ease of administration it is preferable to be # consistent. [ndb_mgmd] HostName=management-server-A-hostname # NodeId=management-server-A-nodeid [ndb_mgmd] HostName=management-server-B-hostname # NodeId=management-server-B-nodeid # Using 2 management servers helps guarantee that there is always an # arbitrator in the event of network partitioning, and so is # recommended for high availability. Each management server must be # identified by a HostName. You may for the sake of convenience specify # a NodeId for any management server, although one will be allocated # for it automatically; if you do so, it must be in the range 1-255 # inclusive and must be unique among all IDs specified for cluster # nodes. # DATA NODE PARAMETERS [ndbd default] NoOfReplicas=2 # Using 2 replicas is recommended to guarantee availability of data; # using only 1 replica does not provide any redundancy, which means # that the failure of a single data node causes the entire cluster to # shut down. As of NDB 8.0.19, it is also possible (but not required) to # use more than 2 replicas, although 2 replicas are sufficient to provide # high availability. LockPagesInMainMemory=1 # On Linux and Solaris systems, setting this parameter locks data node # processes into memory. Doing so prevents them from swapping to disk, # which can severely degrade cluster performance. DataMemory=3456M # The value provided for DataMemory assumes 4 GB RAM # per data node. However, for best results, you should first calculate # the memory that would be used based on the data you actually plan to # store (you may find the ndb_size.pl utility helpful in estimating # this), then allow an extra 20% over the calculated values. Naturally, # you should ensure that each data node host has at least as much # physical memory as the sum of these two values. # ODirect=1 # Enabling this parameter causes NDBCLUSTER to try using O_DIRECT # writes for local checkpoints and redo logs; this can reduce load on # CPUs. We recommend doing so when using NDB Cluster on systems running # Linux kernel 2.6 or later. NoOfFragmentLogFiles=300 DataDir=path/to/data/node/data/directory MaxNoOfConcurrentOperations=100000 SchedulerSpinTimer=400 SchedulerExecutionTimer=100 RealTimeScheduler=1 # Setting these parameters allows you to take advantage of real-time scheduling # of NDB threads to achieve increased throughput when using ndbd. They # are not needed when using ndbmtd; in particular, you should not set # RealTimeScheduler for ndbmtd data nodes. TimeBetweenGlobalCheckpoints=1000 TimeBetweenEpochs=200 RedoBuffer=32M # CompressedLCP=1 # CompressedBackup=1 # Enabling CompressedLCP and CompressedBackup causes, respectively, local checkpoint files and backup files to be compressed, which can result in a space savings of up to 50% over noncompressed LCPs and backups. # MaxNoOfLocalScans=64 MaxNoOfTables=1024 MaxNoOfOrderedIndexes=256 [ndbd] HostName=data-node-A-hostname # NodeId=data-node-A-nodeid LockExecuteThreadToCPU=1 LockMaintThreadsToCPU=0 # On systems with multiple CPUs, these parameters can be used to lock NDBCLUSTER # threads to specific CPUs [ndbd] HostName=data-node-B-hostname # NodeId=data-node-B-nodeid LockExecuteThreadToCPU=1 LockMaintThreadsToCPU=0 # You must have an [ndbd] section for every data node in the cluster; # each of these sections must include a HostName. Each section may # optionally include a NodeId for convenience, but in most cases, it is # sufficient to allow the cluster to allocate node IDs dynamically. If # you do specify the node ID for a data node, it must be in the range 1 # to 144 inclusive and must be unique among all IDs specified for # cluster nodes. (Previous to NDB 8.0.18, this range was 1 to 48 inclusive.) # SQL NODE / API NODE PARAMETERS [mysqld] # HostName=sql-node-A-hostname # NodeId=sql-node-A-nodeid [mysqld] [mysqld] # Each API or SQL node that connects to the cluster requires a [mysqld] # or [api] section of its own. Each such section defines a connection # “slot”; you should have at least as many of these sections in the # config.ini file as the total number of API nodes and SQL nodes that # you wish to have connected to the cluster at any given time. There is # no performance or other penalty for having extra slots available in # case you find later that you want or need more API or SQL nodes to # connect to the cluster at the same time. # If no HostName is specified for a given [mysqld] or [api] section, # then any API or SQL node may use that slot to connect to the # cluster. You may wish to use an explicit HostName for one connection slot # to guarantee that an API or SQL node from that host can always # connect to the cluster. If you wish to prevent API or SQL nodes from # connecting from other than a desired host or hosts, then use a # HostName for every [mysqld] or [api] section in the config.ini file. # You can if you wish define a node ID (NodeId parameter) for any API or # SQL node, but this is not necessary; if you do so, it must be in the # range 1 to 255 inclusive and must be unique among all IDs specified # for cluster nodes.