| バージョン 8 (更新者: wu, 13 年 前) |
|---|
=== Bigdata Configuration=== #configure
The journal in Bigdata (please refer to http://sourceforge.net/apps/mediawiki/bigdata/index.php?title=StandaloneGuide for details.)
The WORM (Write-Once, Read-Many) is the traditional log-structured append only journal. It was designed for very fast write rates and is used to buffer writes for scale-out. This is a good choice for immortal databases where people want access to ALL history. Scaling is to several billions of triples.
The RW store (Read-Write) supports recycling of allocation slots on the backing file. It may be used as a time-bounded version of an immortal database where history is aged off of the database over time. This is a good choice for standalone workloads where updates are continuously arriving and older database states may be released. The RW store is also less sensitive to data skew because it can reuse B+Tree node and leaf revisions within a commit group on large data set loads. Scaling should be better than the WORM for standalone and could reach to 10B+ triples. The default property file is attachment:RWStore.properties.
Load Performance
Approach 1:
Upload data from Bigdata sparql point(NanoSparqlServer?). Post the data every 10000 lines. Please refer to attachment:upload.pl for details.
Approach 2:
Upload with com.bigdata.rdf.store.DataLoader? tools and RW store default parameter.
And test the situation when adding GC in JVM.
-Xmx55G -Xms30G -XX:+UseG1GC -XX:+TieredCompilation? -XX:+HeapDumpOnOutOfMemoryError
Approach 3:
We modified the following two important parameters(In the rest test we use this configure in default):
com.bigdata.btree.writeRetentionQueue.capacity=500000 com.bigdata.rdf.sail.BigdataSail.bufferCapacity=1000000
Approach 4: Split the file into 12 small files.
Allie upload
Approach 1: 26hours
Approach 2: 5.89hours when Setting JVM GC : 6.75hours
Approach 3: 2.61 hours
Approach 4: 1.03 hours
PDBJ upload
Result: 8.95 hours
Uniprot upload
DDBJ upload
Sparql query performance
Allie query performance
PDBJ query performance
Uniprot query performance
DDBJ query performance
添付ファイル
-
RWStore.properties
(1.7 KB) - 登録者 wu
13 年 前.
-
upload.pl
(1.0 KB) - 登録者 wu
13 年 前.
