公开(公告)号：US07844787B2

公开(公告)日：2010-11-30

申请号：US11823426

申请日：2007-06-27

Applicant: Shyamsundar Ranganathan ,  Kalidas Balakrishnan

Inventor： Shyamsundar Ranganathan ,  Kalidas Balakrishnan

IPC: G06F12/00

CPC classification number: G06F11/2097 ,  G06F11/2094 ,  G06F2201/84

Abstract: Techniques for data replication are presented. A snap shot request is processed within an environment associated with a local volume by flushing pending Input/Output (I/O) operations into an event packet. The event packet is sent to a replicated volume and processed against the replicated volume to create a snap shot version of the local volume.

Abstract translation: 介绍了数据复制技术。 通过将等待的输入/输出（I / O）操作冲洗到事件数据包中，在与本地卷相关联的环境中处理快照请求。 将事件数据包发送到复制卷并针对复制卷进行处理，以创建本地卷的快照版本。

公开(公告)号：US20120328105A1

公开(公告)日：2012-12-27

申请号：US13611170

申请日：2012-09-12

Applicant: Umasankar Mukkara ,  Felix Xavier ,  Shyamsundar Ranganathan

Inventor： Umasankar Mukkara ,  Felix Xavier ,  Shyamsundar Ranganathan

IPC: H04L9/00

CPC classification number: H04L9/0897

Abstract: Techniques for achieving tenant data confidentiality in a cloud environment are presented. A daemon process within a Tenant Storage Machine (TSM) manages a key store for a particular tenant of a cloud storage environment having multiple other tenants. Just TSM storage processes are given access to the key store. Data is decrypted for the particular tenant when access is needed and data is encrypted using encryption keys of the key store when written in the cloud storage environment.

Abstract translation: 介绍了在云环境中实现租户数据机密性的技术。 租户存储机器（TSM）中的守护进程管理具有多个其他租户的云存储环境的特定租户的密钥存储。 只有TSM存储过程才能访问密钥存储。 当需要访问时，为特定租户解密数据，并且在写入云存储环境时使用密钥库的加密密钥对数据进行加密。

公开(公告)号：US20080148000A1

公开(公告)日：2008-06-19

申请号：US11823426

申请日：2007-06-27

Applicant: Shyamsundar Ranganathan ,  Kalidas Balakrishnan

Inventor： Shyamsundar Ranganathan ,  Kalidas Balakrishnan

IPC: G06F12/16

CPC classification number: G06F11/2097 ,  G06F11/2094 ,  G06F2201/84

Abstract: Techniques for data replication are presented. A snap shot request is processed within an environment associated with a local volume by flushing pending Input/Output (I/O) operations into an event packet. The event packet is sent to a replicated volume and processed against the replicated volume to create a snap shot version of the local volume.

Abstract translation: 介绍了数据复制技术。 通过将等待的输入/输出（I / O）操作冲洗到事件数据包中，在与本地卷相关联的环境中处理快照请求。 将事件数据包发送到复制卷并针对复制卷进行处理，以创建本地卷的快照版本。

公开(公告)号：US09270459B2

公开(公告)日：2016-02-23

申请号：US13611170

申请日：2012-09-12

Applicant: Umasankar Mukkara ,  Felix Xavier ,  Shyamsundar Ranganathan

Inventor： Umasankar Mukkara ,  Felix Xavier ,  Shyamsundar Ranganathan

IPC: H04L9/00 ,  H04L9/08

CPC classification number: H04L9/0897

Abstract: Techniques for achieving tenant data confidentiality in a cloud environment are presented. A daemon process within a Tenant Storage Machine (TSM) manages a key store for a particular tenant of a cloud storage environment having multiple other tenants. Just TSM storage processes are given access to the key store. Data is decrypted for the particular tenant when access is needed and data is encrypted using encryption keys of the key store when written in the cloud storage environment.

Abstract translation: 介绍了在云环境中实现租户数据机密性的技术。 租户存储机器（TSM）中的守护进程管理具有多个其他租户的云存储环境的特定租户的密钥存储。 只有TSM存储过程才能访问密钥存储。 当需要访问时，为特定租户解密数据，并且在写入云存储环境时使用密钥库的加密密钥对数据进行加密。

公开(公告)号：US07243289B1

公开(公告)日：2007-07-10

申请号：US10351181

申请日：2003-01-25

Applicant: Honnuduke S. Madhusudhana ,  Rakesh Kumar Bhatia ,  Shyamsundar Ranganathan

Inventor： Honnuduke S. Madhusudhana ,  Rakesh Kumar Bhatia ,  Shyamsundar Ranganathan

IPC: H03M13/00

CPC classification number: H03M13/091

Abstract: A method and system is provided for computing a final cyclic redundancy check (CRC) checksum for an entire data block. The method includes segmenting the data block into at least first and second segments and calculating a partial CRC for each segment. A residue table T is calculated that has ‘R’ entries, where the CRC is R-bits in length. An effective CRC is initialized and the entries of the residue table corresponding to nonzero bits of the partial CRC of the first segment are summed. The final CRC for the data block is computed as the sum of the effective CRC and the partial CRC of the second segment.

Abstract translation: 提供了一种用于计算整个数据块的最终循环冗余校验（CRC）校验和的方法和系统。 该方法包括将数据块分段成至少第一和第二段并计算每个段的部分CRC。 计算具有'R'条目的残差表T，其中CRC是长度为R比特。 初始化有效的CRC，并且将与第一段的部分CRC的非零位对应的残差表的条目相加。 数据块的最后CRC被计算为有效CRC和第二段的部分CRC之和。

公开(公告)号：US20130073806A1

公开(公告)日：2013-03-21

申请号：US13622039

申请日：2012-09-18

Applicant: Felix Xavier ,  Umasankar Mukkara ,  Shyamsundar Ranganathan

Inventor： Felix Xavier ,  Umasankar Mukkara ,  Shyamsundar Ranganathan

IPC: G06F12/00

CPC classification number: G06F11/3442 ,  G06F11/3409 ,  G06F11/3485

Abstract: Techniques for translating Service Level Agreement (SLA) policy into storage controller requirements within a cloud storage environment are presented. System resource metrics for a storage controller are derived. The SLA policy is defined in terms of SLA parameters. Heuristics are used to translate the SLA parameters into defined percentages of system resources for the storage controller, which are compared to the system resource metrics and adjustments are updates are made as needed.

Abstract translation: 介绍了在云存储环境中将服务级别协议（SLA）策略转换为存储控制器要求的技术。 导出存储控制器的系统资源度量。 SLA策略是根据SLA参数定义的。 启发式用于将SLA参数转换为存储控制器的系统资源的定义百分比，与系统资源指标进行比较，并根据需要进行更新。

公开(公告)号：US08082227B2

公开(公告)日：2011-12-20

申请号：US11821841

申请日：2007-06-26

Applicant: Kalidas Balakrishnan ,  Shyamsundar Ranganathan

Inventor： Kalidas Balakrishnan ,  Shyamsundar Ranganathan

IPC: G06F7/00 ,  G06F17/00

CPC classification number: G06F11/1451 ,  G06F11/1458 ,  G06F11/1464 ,  G06F11/1469

Abstract: Techniques for the session sensitive data backups and restores are presented. Data having a plurality of hard linked file references are backed up and restored once during a backup operation. Any modifications to the backed up data are noted as session-specific versions and also backed up once. The hard linked file references are maintained in a data structure and managed during backups to define associations to the backed up data and to the session-specific versions of the data. The data structure is also used during restores to re-establish desired hard linked file reference associations to either the backed up data or to a particular session-specific versions of the data.

Abstract translation: 介绍了会话敏感数据备份和恢复技术。 具有多个硬链接文件引用的数据在备份操作期间备份并恢复一次。 对备份数据的任何修改都被记录为会话特定版本，并且还会备份一次。 硬链接文件引用保留在数据结构中，并在备份期间进行管理，以定义与备份数据和数据的会话特定版本的关联。 在恢复期间也使用数据结构，以将所需的硬链接文件引用关联重新建立到备份数据或数据的特定会话特定版本。

公开(公告)号：US20110191291A2

公开(公告)日：2011-08-04

申请号：US11821841

申请日：2007-06-26

Applicant: Kalidas Balakrishnan ,  Shyamsundar Ranganathan

Inventor： Kalidas Balakrishnan ,  Shyamsundar Ranganathan

IPC: G06F7/00 ,  G06F17/00

CPC classification number: G06F11/1451 ,  G06F11/1458 ,  G06F11/1464 ,  G06F11/1469

Abstract: Techniques for the session sensitive data backups and restores are presented. Data having a plurality of hard linked file references are backed up and restored once during a backup operation. Any modifications to the backed up data are noted as session-specific versions and also backed up once. The hard linked file references are maintained in a data structure and managed during backups to define associations to the backed up data and to the session-specific versions of the data. The data structure is also used during restores to re-establish desired hard linked file reference associations to either the backed up data or to a particular session -specific versions of the data.

Abstract translation: 介绍了会话敏感数据备份和恢复技术。 具有多个硬链接文件引用的数据在备份操作期间备份并恢复一次。 对备份数据的任何修改都被记录为会话特定版本，并且还会备份一次。 硬链接文件引用保留在数据结构中，并在备份期间进行管理，以定义与备份数据和数据的会话特定版本的关联。 在还原期间还使用数据结构，以将所需的硬链接文件引用关联重新建立到备份数据或特定会话 - 数据的特定版本。

公开(公告)号：US20080209145A1

公开(公告)日：2008-08-28

申请号：US11888746

申请日：2007-08-02

Applicant: Shyamsundar Ranganathan ,  Kalidas Balakrishnan

Inventor： Shyamsundar Ranganathan ,  Kalidas Balakrishnan

IPC: G06F12/16

CPC classification number: G06F11/2074

Abstract: Techniques for asynchronous data replication are presented. A bitmap records changes to selective blocks of data on a source between replication periods. During a replication, the bitmap is copied and used to acquire changed blocks from the source to write to a replica. Should a unprocessed block have a pending write detected during the replication, then that block is copied into cache from the source before the write is processed on the source. The pending write then processes against the source; the copied block is flushed to the replica; the original bitmap and copied bitmap are updated.

Abstract translation: 介绍异步数据复制技术。 位图记录了在复制周期之间的源上的选择性数据块的更改。 在复制期间，位图被复制并用于从源写入到副本的更改的块。 如果未处理的块在复制期间检测到待处理的写入，则在源处理写入之前，该块将从源中复制到缓存中。 待处理的写入然后针对源进行处理; 复制的块被刷新到副本; 原始位图和复制位图被更新。