Multiple Granularity Locking 편집하기 (부분)

==Lock Modes and Compatibility==
Multiple granularity locking introduces additional lock modes beyond the standard shared and exclusive locks:
*'''Intention Shared (IS):''' Indicates intention to acquire shared locks on lower-level nodes.
*'''Intention Exclusive (IX):''' Indicates intention to acquire exclusive locks on lower-level nodes.
*'''Shared and Intention Exclusive (SIX):''' A combination of a shared lock at the current level and intention exclusive locks on lower levels.
*'''Shared (S):''' Allows reading but not writing of a data item.
*'''Exclusive (X):''' Allows both reading and writing of a data item.
The compatibility matrix for these lock modes is as follows:
{| class="wikitable"
! !!IS!!IX!!S!!SIX!!X
|-
!IS
|Yes||Yes||Yes||Yes||No
|-
!IX
|Yes||Yes||No||No||No
|-
!S
|Yes||No||Yes||No||No
|-
!SIX
|Yes||No||No||No||No
|-
!X
|No||No||No||No||No
|}