Invention Grant
US09037802B2 Methods for managing a cache in a multi-node virtual tape controller
有权
管理多节点虚拟磁带控制器中的缓存的方法
- Patent Title: Methods for managing a cache in a multi-node virtual tape controller
- Patent Title (中): 管理多节点虚拟磁带控制器中的缓存的方法
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Application No.: US13483827Application Date: 2012-05-30
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Publication No.: US09037802B2Publication Date: 2015-05-19
- Inventor: Ralph T. Beeston , Erika M. Dawson , Duke A. Lee , David Luciani , Joel K. Lyman
- Applicant: Ralph T. Beeston , Erika M. Dawson , Duke A. Lee , David Luciani , Joel K. Lyman
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Zilka-Kotab, PC
- Main IPC: G06F12/00
- IPC: G06F12/00 ; G06F12/08
Abstract:
According to one embodiment, a method for managing cache space in a virtual tape controller includes receiving data from at least one host using the virtual tape controller; storing data received from the at least one host to a cache using the virtual tape controller; sending a first alert to the at least one host when a cache free space size is less than a first threshold and entering into a warning state using the virtual tape controller; sending a second alert to the at least one host when the cache free space size is less than a second threshold and entering into a critical state using the virtual tape controller; and allowing previously mounted virtual drives to continue normal writing activity when in the critical state.
Public/Granted literature
- US20120239878A1 METHODS FOR MANAGING A CACHE IN A MULTI-NODE VIRTUAL TAPE CONTROLLER Public/Granted day:2012-09-20
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