公开(公告)号：US09519439B2

公开(公告)日：2016-12-13

申请号：US14012331

申请日：2013-08-28

Applicant: Compellent Technologies

Inventor： Pradeep Sundarrajan ,  Melwyn D'Souza

IPC: G06F12/00 ,  G06F3/06 ,  G06F11/34

CPC classification number: G06F3/0619 ,  G06F3/0608 ,  G06F3/065 ,  G06F3/067 ,  G06F3/0685 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/3409 ,  G06F11/3485 ,  G06F2201/81 ,  G06F2201/84

Abstract: A method of data progression in a data storage system having at least two tiers of storage space. A first tier may include storage space in a SLC SSD and a second tier may include storage space in a MLC SSD. The method may include setting a predetermined free space threshold for the first tier of storage space, monitoring free space in the first tier of storage space, and when the amount of available free space in the first tier of storage space decreases to the predetermined free space threshold, generating an on-demand snapshot of at least a portion of the data of the first tier of storage space by designating that data as read-only. The on-demand snapshot may then be transferred to the second tier of storage space, thereby freeing the corresponding portion of data of the first tier of storage space for new writes.

Abstract translation: 一种具有至少两层存储空间的数据存储系统中的数据进展方法。 第一层可以包括SLC SSD中的存储空间，并且第二层可以包括MLC SSD中的存储空间。 该方法可以包括为第一层存储空间设置预定的可用空间阈值，监视第一层存储空间中的可用空间，以及当第一层存储空间中的可用空闲空间量减少到预定的可用空间 阈值，通过将该数据指定为只读来生成第一层存储空间的至少一部分数据的按需快照。 然后可以将按需快照传送到第二层存储空间，从而释放用于新写入的第一层存储空间的相应部分的数据。

公开(公告)号：US20150067231A1

公开(公告)日：2015-03-05

申请号：US14012331

申请日：2013-08-28

Applicant: Compellent Technologies

Inventor： Pradeep Sundarrajan ,  Melwyn D'Souza

IPC: G06F3/06

CPC classification number: G06F3/0619 ,  G06F3/0608 ,  G06F3/065 ,  G06F3/067 ,  G06F3/0685 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/3409 ,  G06F11/3485 ,  G06F2201/81 ,  G06F2201/84

Abstract: A method of data progression in a data storage system having at least two tiers of storage space. A first tier may include storage space in a SLC SSD and a second tier may include storage space in a MLC SSD. The method may include setting a predetermined free space threshold for the first tier of storage space, monitoring free space in the first tier of storage space, and when the amount of available free space in the first tier of storage space decreases to the predetermined free space threshold, generating an on-demand snapshot of at least a portion of the data of the first tier of storage space by designating that data as read-only. The on-demand snapshot may then be transferred to the second tier of storage space, thereby freeing the corresponding portion of data of the first tier of storage space for new writes.

Abstract translation: 一种具有至少两层存储空间的数据存储系统中的数据进展方法。 第一层可以包括SLC SSD中的存储空间，并且第二层可以包括MLC SSD中的存储空间。 该方法可以包括为第一层存储空间设置预定的可用空间阈值，监视第一层存储空间中的可用空间，以及当第一层存储空间中的可用空闲空间量减少到预定的可用空间 阈值，通过将该数据指定为只读来生成第一层存储空间的至少一部分数据的按需快照。 然后可以将按需快照传送到第二层存储空间，从而释放用于新写入的第一层存储空间的相应部分的数据。