Big Table
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Big Table paper review
Definition:
Bigtable is a distributed storage system for managing structured data that is designed to scale to a very large size
Tablet: Large table broken into tablet at boundary
Background:
Many Google applications such as web indexing, google earth use BigTable to store data.
这些服务无论从数据大小,or latency requirement 都有很大不同
characteristics:
-Simple data model:
dynamic control over data layout and format
-Data is indexed using row and column names
-Bigtable schema parameters let clients dynamically control whether to serve data out of memory or from disk.
-Based on GFS to store data and log files
Components:
-One master server
-library linked into every client (client communicate directly with tablet for read&write, 和GFS 原理一样)
-Dynamically added tablet server (Used to store table,each tablet server store ten to a thousand tables)
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