Table of Contents
Introduction............................................................................................................................5
Chapter One – Virtual Devices (vdevs), Vdev Labels, and Boot Block................................6
Section 1.1: Virtual Devices..............................................................................................6
Section 1.2: Vdev Labels..................................................................................................6
Section 1.2.1: Label Redundancy.................................................................................7
Section 1.2.2: Transactional Two Staged Label Update..............................................7
Section 1.3: Vdev Technical Details..................................................................................8
Section 1.3.1: Blank Space...........................................................................................8
Section 1.3.2: Boot Block Header................................................................................8
Section 1.3.3: Name-Value Pair List...........................................................................8
Section 1.3.4: The Uberblock.....................................................................................12
Section 1.4: Boot Block...................................................................................................14
Chapter Two: Block Pointers and Indirect Blocks................................................................15
Section 2.1: DVA – Data Virtual Address.....................................................................15
Section 2.2 : GRID........................................................................................................16
Section 2.3: GANG.......................................................................................................16
Section 2.4: Checksum..................................................................................................17
Section 2.5: Compression..............................................................................................18
Section 2.6 : Block Size.................................................................................................18
Section 2.7: Endian........................................................................................................19
Section 2.8: Type...........................................................................................................19
Section 2.9: Level..........................................................................................................20
Section 2.10: Fill............................................................................................................20
Section 2.11: Birth Transaction.....................................................................................21
Section 2.12: Padding....................................................................................................21
Chapter Three: Data Management Unit................................................................................22
Section 3.1 : Objects........................................................................................................22
Section 3.2: Object Sets...................................................................................................26
Chapter Four – DSL ............................................................................................................29
Section 4.1 : DSL Infrastructure......................................................................................29
Section 4.2: DSL Implementation Details.......................................................................31
Section 4.3: Dataset Internals..........................................................................................32
Section 4.4: DSL Directory Internals..............................................................................34
Chapter Five – ZAP..............................................................................................................37
Section 5.1: The Micro Zap.............................................................................................38
Section 5.2: The Fat Zap.................................................................................................39
Section 5.2.1: zap_phys_t...........................................................................................39
Section 5.2.2: Pointer Table........................................................................................41
Section 5.2.3: zap_leaf_phys_t...................................................................................41
Section 5.2.4 : zap_leaf_chunk...................................................................................43
Chapter Six – ZPL................................................................................................................45
Section 6.1: ZPL Filesystem Layout................................................................................45
Section 6.2: Directories and Directory Traversal.............................................................45
Section 6.3: ZFS Access Control Lists............................................................................47
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2013-10-16
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overbai2014-09-19深入立即zfs必看。很好。
