2 mb since oset 4099 514 b will revoke the token for 0

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Unformatted text preview: ara 2/11/13 CS480 Principles of Data Management Spring 2013 2/10/13 CS480 Principles of Data Management Frequently Asked Question A: whole file B: 514 ­1022 Today, 1.2 MB Since offset 4099 >514, B will revoke the token for 0 ~ 4098. However, GPFS will round this token to 0 ~ 4095 for B. 2/10/13 4099 Colorado State University, Sangmi Pallickara CS480 Principles of Data Management 3 Spring 2013 2/11/13 Colorado State University, Sangmi Pallickara Spring 2013 Why have a single Master? Single master Manage system metadata Leasing of chunks Garbage collec%on of orphaned chunks Chunk migra%ons 2/8/13 4 Colorado State University, Sangmi Pallickara CS480 Principles of Data Management Master operations •  •  •  •  •  Spring 2013 •  Master’s operaIons •  Relaxed consistency 0 A will sIll have the token for 4096 ~ infinity (here 1.2MB). Reference) Disk Blocks: 0 511 1023 1535 2047...
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