Non-lock concurrency control

In Computer Science, in the field of databases, non-lock concurrency control is a concurrency control method used in relational databases without using locking.

There are several non-lock concurrency control methods, which involve the use of timestamps on transaction to determine transaction priority:

• Optimistic concurrency control
  • Timestamp-based concurrency control
  • Validation-based concurrency control
  • Multiversion concurrency control
    • Snapshot isolation

نيهيهقهقههقتفتهبهبنفننفنف بنهبهبن نبنبنبنبنبهنبنبتبنتبندنبنبنب نبنتبنبنبوبت تبونبهبخ هدهبنقننب ب دي ما بعرف ليش بس مش عارفه كيف بكون أنا مش عارفة كيف بكون معايا مش عايزة اعرف مين هو ޖކޕިކޖގ ުބފެގޖޮޖމގގ ހހޔގގގފފފފنවසයටරාජි්‍ර්‍ර්‍ර්‍ර්්ිඅ වවයයයයයහහයබඉාටඑ යටෙයඉයයයය. ෙටයටඑහම

See also

• Concurrency pattern
• InterBase
• Lock-free and wait-free algorithms