公开(公告)号：US20170123718A1

公开(公告)日：2017-05-04

申请号：US15046435

申请日：2016-02-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vikas SINHA ,  Zvi GUZ ,  Gunneswara Rao MARRIPUDI

IPC: G06F3/06

CPC classification number: G06F3/0652 ,  G06F3/0608 ,  G06F3/0617 ,  G06F3/0653 ,  G06F3/067 ,  G06F3/0688 ,  G06F12/0246 ,  G06F2212/1041 ,  G06F2212/7205

Abstract: A distributed storage system can include a storage node (125, 130, 135). The storage node (125, 130, 135) can include a Solid State Drive (SSD) or other storage device that employs garbage collection (140, 145, 150, 155, 160, 165, 225, 230), a device garbage collection monitor (205), a garbage collection coordinator (210), an Input/Output (I/O) redirector (215), and an I/O resynchronizer (220). The device garbage collection monitor (205) can determine whether any storage devices (140, 145, 150, 155, 160, 165, 225, 230) need to perform garbage collection. The garbage collection coordinator (210) can schedule when the storage device (140, 145, 150, 155, 160, 165, 225, 230) can perform garbage collection. The I/O redirector (215) can redirect read requests (905) and write requests (1005) away from the storage device (140, 145, 150, 155, 160, 165, 225, 230) when it is performing garbage collection. The I/O resynchronizer (220) can ensure that data on the storage device (140, 145, 150, 155, 160, 165, 225, 230) is up-to-date after garbage collection finishes.

公开(公告)号：US20170123700A1

公开(公告)日：2017-05-04

申请号：US15336772

申请日：2016-10-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vikas K. SINHA ,  Gunneswara Rao MARRIPUDI ,  Jianjian HUO ,  Ajit YAGATY

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F12/0253 ,  G06F3/061 ,  G06F3/0635 ,  G06F3/065 ,  G06F3/067 ,  G06F2212/702

Abstract: A distributed storage system node (125, 130, 135) is disclosed. The distributed storage system node (125, 130, 135) may include at least one storage device (140, 145, 150, 155, 160, 165, 225, 230), which may act as the primary replica (2315) for data subject to an Input/Output (I/O) request (905). A cost analyzer (2310) may calculate a local estimated time required (3305) to complete the I/O request (905) at the primary replica, and a remote estimated time required (3710) to complete the I/O request (905) at a secondary replica (2320, 2325) of the data. An I/O redirector (215) may direct the I/O request (905) to either the primary replica (2315) or the secondary replica (2320, 2325) based on the local estimated time required (3305) and the one remote estimated time required (3710).