增加一个磁盘，volumes怎么配置

Question

我的DolphinDB是单节点部署，dolphindb.cfg配置如下：

#DolphinDB Configuration File

#The DolphinDB server's site info. Seperated by colon ":", the first part is ip address, the second part is port number, and the last part is alias name.
#localSite=localhost:8848:local8848 
                              
#the maximum memory (in terms of Gigabytes) allocated to DolphinDB. If set to 0, there will be no limitations on memory usage.
#maxMemSize=0

#the maximum number of connections to DolphinDB server
#maxConnections=64

#the number of workers (default is the number of cores of the machine)
#workerNum=4

#Specify the maximum connections per remote site
#The default value for maxConnectionPerSite is number of cores 
#maxConnectionPerSite=2

#localExecutors corresponds to your CPU cores; without specification, the value is the number of physical cores minus one(for worker); 
#e.g. if the system has 4 physical cores, the number of localExecutors will be 3 

#localExecutors=3 

mode=single

persistenceDir=dbcache
maxPubConnections=10
subPort=8000
maxPartitionNumPerQuery=9999999999999
newValuePartitionPolicy=add

现在安装目录所在磁盘快满了，想给数据文件增加一个目录，应该怎么配？我配置如下：

volumes=D:\DolphinDB\DolphinDB_Win64_V1.10.20\server\local8848\storage\CHUNKS,e:\data

加载数据库时会提示：

pt = loadTable("dfs://compodb", "pt") => FileBlock[/compodb/domain, 2218b5af-2c3f-1ba0-46e6-8fbc49779c3e, {}, v1, 264, c1] returned from name node didn't contain any site

Answer 1

增加目录，必须把原先的volumes默认配置也写入volumes。

DolphinDB中volumes的默认配置是：<HomeDir>/<nodeAlias>/storage 。
其中HomeDir是节点home目录，可通过运行getHomeDir()得到；nodeAlias是节点名，可通过getNodeAlias()得到。

另一个得到当前volumes的方法是通过运行getAllStorages()，得到的directory字段值即是当前volumes配置。注意重启前先注释掉volumes配置项,再运行getAllStorages()。

你的节点home目录是D:\DolphinDB\DolphinDB_Win64_V1.10.20\server,节点名是local8848，所以配置如下：

volumes=D:DolphinDB\DolphinDB_Win64_V1.10.20\server\local8848\storage,e:\data