Abstract: Storage systems and methods are presented. A method can include: accessing virtual machine image information; performing an examination process on the virtual machine image information to determine characteristics of the virtual machine image information including temporary attributes of the virtual machine image information; performing an exclusion block identification process based upon results of the examination process to identify exclusion blocks, wherein exclusion blocks are identified for exclusion from a subsequent operation; and forwarding an indication of the exclusion blocks to the subsequent operation. In one embodiment the method is performed within a File Server.

Abstract: Systems and methods for fault handling are presented. In one embodiment, a fault handling method includes: performing an information collection process, wherein the information collection process includes collecting information regarding guest operating system files of a virtual machine; performing a selective replication region identification process, wherein the selective replication region identification process includes identifying regions associated with a selective amount of the guest operating system files; and performing a replication process based upon result of the replication region identification process. In one embodiment, the selective replication region identification process includes identifying regions associated with files of interest. The selective replication region identification process can include identifying regions associated with temporary files.

Abstract: A method and apparatus for detecting violations of data loss prevention (DLP) policies based on reputation scores.

Abstract: An access request that includes a combination of a file identifier and an offset value is received. If the page cache does not contain the page indexed by the combination, then the file system is accessed and the offset value is mapped to a disk location. The file system can access a block map to identify the location. A table (e.g., a shared location table) that includes entries (e.g., locations) for pages that are shared by multiple files is accessed. If the aforementioned disk location is in the table, then the requested page is in the page cache and it is not necessary to add the page to the page cache. Otherwise, the page is added to the page cache.

Abstract: Systems and methods for fault handling are presented. In one embodiment, a fault handling method includes: performing an information collection process, wherein the information collection process includes collecting information regarding guest operating system files of a virtual machine; performing a selective replication region identification process, wherein the selective replication region identification process includes identifying regions associated with a selective amount of the guest operating system files; and performing a replication process based upon result of the replication region identification process. In one embodiment, the selective replication region identification process includes identifying regions associated with files of interest. The selective replication region identification process can include identifying regions associated with temporary files.

Abstract: An interface is disclosed that makes information obtained from a file deduplication process available to an application for the efficient operation thereof. A data deduplication repository is scanned to determine a plurality of file segments and respective checksum values associated with the segments. A data structure is generated that allows shared segments to be identified by indexing using a common checksum value. The segments also indicate the file to which they belong and may also include a timestamp value. This data structure is updated as files are modified, etc. The data structure is accessible to an application program so that the application program can readily determine which segments are shared between multiple files. With this information, the application can efficiently process the segment once rather than multiple times. Timestamps can be used by the application to efficiently identify only those segments that were accessed after a given time.

Abstract: A method for performing storage system de-duplication. The method includes accessing a plurality of initial partitions of files of a storage system and performing a de-duplication on each of the initial partitions. For each duplicate found, an indicator comprising the metadata that is similar across said each duplicate is determined. For each indicator, indicators are determined that infer a likelihood that data objects with said indicators contain duplicate data is high. Optimized partitions are generated in accordance with the chosen indicators. A de-duplication process is subsequently performed on each of the optimized partitions.

Abstract: A periodic checkpoint method for a file system replication source. The method comprises generating a first checkpoint at a first time on a file system replication source and identifying a set of data objects from the replication source that have been modified during a time period between the first time and a subsequent second time. A periodic checkpoint is then generated at the second time on the file system replication source by using the set of data objects.

Abstract: Systems and methods for information storage replication are presented. In one embodiment, a namespace conversion process is performed. Node information regarding a file systems operation change is received. A changed node to pathname object conversion process is performed. An unchanged node to pathname object conversion process is performed. In one exemplary implementation, the changed node to pathname object conversion process and the unchanged node to pathname object conversion process utilize data structures that return the object indications and parent node indications. An object indication is inserted in a pathname.

Abstract: Techniques for file system recovery are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for file system recovery comprising starting a recovery process for a failed node, utilizing the recovery process to read one or more committed but un-applied transactions from storage associated with the failed node, and recreating the one or more committed but un-applied transactions in memory associated with the recovery process.

Abstract: Techniques for file system recovery are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for file system recovery comprising starting a recovery process for a failed node, utilizing the recovery process to read one or more committed but un-applied transactions from storage associated with the failed node, and recreating the one or more committed but un-applied transactions in memory associated with the recovery process.