International Business Machines Corporation

Entropic Communications, Inc.

Karthik Iyer

Sasikanth Eda

Sandeep R Patil

Abhishek Jain

Huzefa Pancha

Muthu Annamalai Muthiah

Aravinda Subramanya

A computer-implemented method for provisioning cloud computing clusters includes receiving a request to create a cloud computing cluster, the cloud computing cluster comprising a clustered filesystem and a requested number of processing nodes and attached storage devices associated with the cloud computing cluster and initiating an initialization process for a single processing node and a corresponding attached storage device responsive to receiving the request to create the cloud computing cluster. The method may also include, previous to completion of the initialization process, requesting and receiving an IP address for the single processing node and a device ID for the corresponding attached storage device from one or more cloud infrastructure controllers and configuring the clustered filesystem and a corresponding WAN cache using the received IP address and the received device ID. A system and computer program product corresponding to the above method are also disclosed herein.

Increasing resource utilization in cloud computing clusters

Provided is a method for performing a file system consistency check. The method comprises calculating, by a first thread that does not have access to an inode table, file block addresses for one or more files to be checked by the thread. The method further comprises collecting validity information for the one or more files. The method further comprises reading information relating to the one or more files from the inode table. The reading is performed in response to the thread being given access to the inode table after the calculating operation. The method further comprises validating the information by comparing the information from the inode table to the validity information.

Reducing file system consistency check downtime

A method for prioritizing data in mounted filesystems for FSCK operations is disclosed. An apparatus and computer program product also perform the functions of the method. In certain embodiments, the method includes selecting a prioritization mode from a plurality of prioritization modes, assigning a rank, based on the selected prioritization mode, to files in a file system, and analyzing, according to the assigned rank, the files to identify corrupted files.

Prioritization of data in mounted filesystems for FSCK operations

A file system check (fsck) utility configured to create a file system clone of an active file system. Respective user operations associated with the active file system are directed to the file system clone while the active file system undergoes fsck operations. After completing fsck operations and resolving file system corruptions in the active file system, the file system clone and the active file system are merged. After merging the file system clone and the active file system, respective user operations associated with the active file system are directed to the active file system and the file system clone is discarded.

Online file system check using file system clone

A method of encrypting a digital file composed of a sequence of bytes, each byte defined by a relative position within the digital file and a value, the method comprising: using an encryption key to encode the relative position separately from the value of each byte; and producing an encrypted digital file in which the correlation between relative position and value of each byte in the original digital file is concealed in the encrypted digital file.

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Bengaluru, India

Karthik Iyer