Dell Products Inc.

Emc IP Holding Company LLC

Southwest Petroleum University

Sichuan Green & Top Technology Co., Ltd

Sichuan Yuanxing Rubber Co., Ltd.

Yang Zhang

Chaojun Zhao

Shuangshuang Liang

Jingyi Wang

Hao Wang

Jiang Tan

Xiaojiang Yang

Jincheng Mao

Jie He

Pan Xiao

Hongyuan Zeng

Chong Lin

Qi Jiang

Siyuan Huang

Jinhua Mao

Sikai Dai

Allen Zhao

Fangjie Wu

An Chen

Chunsheng Yu

Kiko Wang

Jiali Liu

Xiang Zhou

Jinzhou Zhao

Chi Wang

Weilan Pu

Fang Du

Zhenzong Jiang

Heng Zhang

Junfeng Wu

Zhibin Wang

Yongchao Wang

Allen Chen

Ivan A Barajas Vargas

Ke Huang

Guoqiang Tian

Clyde Xu Chen

A method for garbage collection for a storage system in an illustrative embodiment includes determining input/output (IO) access popularity of a plurality of partially occupied unit blocks in response to receiving an instruction for garbage collection for the storage system. The method further includes selecting two unit blocks from the plurality of partially occupied unit blocks based on the utilization and the IO access popularity of the plurality of partially occupied unit blocks. In addition, the method further includes determining to fully release the two unit blocks or to partially release the two unit blocks based on the two unit blocks and a target block. In this manner, by considering the IO access popularity of the unit blocks, the less active unit blocks are merged as preferentially as possible, which reduces the probability of fragment jitter, thereby improving the efficiency of garbage collection.

Method, device, and computer program product for garbage collection for storage system

Embodiments of the present disclosure provide a method, an electronic device, and a program product for reclaiming a storage space. The method includes: determining the number of a plurality of blocks to be merged into one block based on a space usage of a storage system; selecting a block combination for merging from a plurality of partially used blocks of the storage system, the block combination including the determined number of partially used blocks; and reclaiming a storage space from the storage system by merging the partially used blocks in the block combination into one block. In this way, resources of the storage system can be efficiently utilized, so that more partially used blocks are reclaimed, thereby reclaiming the storage space more effectively.

Method, electronic device, and program product for reclaiming storage space

Embodiments of the present disclosure relate to a method, an electronic device, and a computer program product for compressing data. The method includes determining a plurality of access levels of a plurality of storage areas in a storage space based on a plurality of input/output (IO) counts of the plurality of storage areas in a historical time period. The method further includes determining an access level threshold based on the utilization of the storage space. The method further includes selecting at least one target storage area among the plurality of storage areas based on the plurality of access levels and the access level threshold. The method further includes compressing a plurality of pages in the at least one target storage area. Embodiments of the present disclosure provide a strategy of merging and compression based on a system state, which balances data compression efficiency and system performance.

Method, electronic device, and computer program product for compressing data based on segment IO counts of respective time segments for a storage area

Methods, system, and non-transitory processor-readable storage medium for a test selection system are provided herein. An example method includes selecting, by a test selection system, a regression test case from a plurality of regression test cases in a software testing lifecycle system. The test selection system determines a product release weight associated with the regression test case, where the product release weight incorporates new features associated with a product release. The test selection system obtains a regression test case value for the regression test case by applying the product release weight. The test selection system selects the regression test case for use in regression testing for the product release, based on the regression test case value and executes the regression test case on a system.

Intelligent way to select regression test cases in system test

Techniques for disk mapping involve dividing a plurality of disks into a plurality of groups based on the number and type of the plurality of disks. Such techniques further involve dividing the plurality of groups into a set of available groups and a set of unavailable groups based on the type of a target redundant array of independent disks (RAID), wherein an available group represents that disk units in the available group are able to form the target RAID, and an unavailable group represents that disk units in the unavailable group are unable to form the target RAID. Such techniques further involve enabling, by mapping one or more disk units in one or more available groups of the set of available groups into the set of unavailable groups, one or more unavailable groups of the set of unavailable groups to form the target RAID.

Method, electronic device, and program product for disk mapping

An apparatus comprises a processing device configured to determine syncing progress metrics for replication sessions established between a source and a destination storage system, each of the replication sessions being associated with a recovery point objective and having an assigned bandwidth quota. The processing device is also configured to identify whether a first replication session is not expected to meet its associated first recovery point objective based at least in part on its determined first syncing progress metric and whether at least a second replication session is expected to meet its associated second recovery point objective based at least in part on its determined second syncing progress metric. The processing device is further configured, responsive to identifying the first and second replication sessions, to update a first assigned bandwidth quota for the first replication session and a second assigned bandwidth quota for the second replication session.

Managing bandwidth quotas for replication sessions established between source and destination storage systems

Tyre

Automatic file system capacity management techniques are provided using file system utilization prediction. One method comprises obtaining input data representing a utilization of a storage capacity of a file system of a given storage system; predicting a future utilization of the storage capacity of the file system based on a portion of the obtained input data; and automatically adjusting the storage capacity of the file system based at least in part on a result of a comparison of the predicted utilization of the storage capacity to a current utilization of the storage capacity. The comparison of the predicted utilization to a current utilization of the storage capacity may comprise comparing the current utilization of the storage capacity to the predicted utilization of the storage capacity for at least first and second time periods following a current time period to determine a trend of the utilization of the storage capacity.

Automatic file system capacity management using file system utilization prediction

Dynamic snapshot scheduling techniques are provided using storage system metrics. One method comprises obtaining a schedule for generating snapshots of a portion of a storage system; automatically adjusting snapshot generation parameters in the schedule based on: (i) a current storage pool usage metric, (ii) an input/output metric of at least one storage resource in the portion of the storage system, (iii) a measure of snapshots in a destroying state, and/or (iv) a measure of a number of created snapshots; and initiating a generation of a snapshot of the storage system portion in accordance with the adjusted schedule. A snapshot generation frequency may be increased in response to an increase of: the current storage pool usage metric, the number of snapshots in the destroying state, and/or the number of created snapshots. A snapshot generation frequency may be decreased in response to an increase of the I/O metric of the at least one storage resource.

Dynamic snapshot scheduling using storage system metrics

An organic acid system with high temperature resistance, including: 80-90% by weight of a solid organic acid anhydride, 3-10% by weight of a hydrolysis catalyst, and 5-10% by weight of a stabilizer. A preparation method and an application of the organic acid system are also provided herein.

Organic acid system with high temperature resistance

Techniques provide storage space balance for a file system. Along these lines, it is determined whether a first allocation proportion of a first metadata storage space of a first type of metadata from among one or more types of metadata of a file system is greater than a first threshold proportion. If the first allocation proportion is greater than the first threshold proportion, a metadata storage space is reserved for the first type of metadata from a storage space of the file system.

Method, device and computer program product of balance of storage space for file system

A spherical organic nano boron crosslinker with a PAMAM core and a preparation method thereof, and a gel fracturing fluid. A chemical structure of the spherical organic nano boron crosslinker is shown as follows: In the formula, n=0, 1, 2 or 3; and 

Spherical organic nano boron crosslinker with PAMAM core and preparation method thereof, and gel fracturing fluid

Techniques for adjusting storage space involve: receiving a request for adjusting available storage space of a user in a filesystem from a first size to a second size; determining whether to allow to adjust the available storage space based on the request; and in response to allowing to adjust the available storage space, adjusting the available storage space to the second size. Accordingly, not only operations that an administrator needs to perform for adjusting the available storage space of a user is reduced, but also a quick and correct response for a request from a user of adjusting the available storage space is guaranteed.

Method, a device, and a computer program product for adjusting a storage space

The disclosure relates to a method for producing heavy oil by generating solvents in situ in the reservoir, an electric heating device is used to heat up the crude oil in the reservoir near the wellbore to the target temperature. Chemical reaction additives are injected into the heating section to meet the preset reaction conditions for the high temperature thermal cracking and aquathermolysis of crude oil, so as to generate light hydrocarbon components and gases. Under the effect of heat and gravity, the light hydrocarbon components and gases rise to the steam chamber. The light hydrocarbons and some gases that move to the vapor-liquid interface of the steam chamber are dissolved in the crude oil to reduce the viscosity of crude oil and increase the production rate of crude oil.

Method for producing heavy oil by generating solvents in situ in the reservoir

The invention discloses an integrated method for nitrogen-assisted carbon dioxide fracturing and development of shale oil reservoirs, comprising the following steps: fracture the target shale reservoir with nitrogen-assisted carbon dioxide; after fracturing, firstly inject carbon dioxide gas into the target shale oil reservoir, and then inject nitrogen gas to push the carbon dioxide gas into the further location of the oil reservoir; shut in the well in the target shale oil reservoir; after shut-in, open the well to implement depletion production; after the first cycle of production, the slug volume of the injected gas and the shut-in time are 1.5 times of those in the previous cycle in the subsequent production, and Steps 5 to 7 are repeated for each cycle. The present invention maximizes the recovery efficiency of shale oil reservoirs; in this way, carbon dioxide gas can be used most efficiently, making the development of shale reservoir more economical and efficient; the integrated fracturing and development design enables the field operation to be streamlined and standardized, and thus different departments to cooperate each other closer.

Integrated method for nitrogen-assisted carbon dioxide fracturing and development of shale oil reservoirs

Growing community of inventors

Chengdu, China

Yang Zhang