Emc IP Holding Company LLC

Evgeny Katz

Zeev Shusterman

Rivka Mayraz Matosevich

Doron Tal

Roman Spiegelman

Lior Oded Bahat

Roi Tagar

Gil Ben Zeev

Itai Rosenblatt

Tamir Segev

Gil BenZeev

Nir Brifman

Techniques are provided for implementing storage block balancing using volume part migration. One method comprises obtaining a capacity utilization of storage blocks each storing a portion of one or more storage volumes; and when the capacity utilization of a given storage block is above an upper target threshold, migrating a volume part of the given storage block to a different storage block having a capacity utilization below a lower target threshold, wherein the different storage block is within a same storage pool as the given storage block, and wherein the volume part comprises a subset of a storage volume. A volume part from a first storage block may also (or alternatively) be migrated to a second storage block when: (i) a number of blocks exceed a first threshold; (ii) a plurality of volume parts of the first storage block fit in one or more additional storage blocks in the same storage pool that are below the lower target threshold; and/or (iii) a storage block having a lowest utilization in the storage pool is smaller than a second threshold.

Storage block balancing using volume part migration

Techniques are provided for scheduling storage volume migrations based on storage volume priorities and specified constraints. One method comprises generating a migratable volume list indicating storage volumes that can be migrated by evaluating available storage volumes according to an assigned priority and adding a storage volume to the migratable volume list in response to one or more constraints being satisfied that limit a migration of one or more of the storage volumes; and scheduling a migration of a volume part of a given storage volume from the migratable volume list based at least in part on a reevaluation of one or more of the constraints. The migratable volume list can be sorted by the assigned priority for each of the storage volumes. The migratable volume list can be regenerated in response to an event occurring that modifies the migratable volume list.

Storage volume migration scheduling based on storage volume priorities and specified constraints

Techniques are provided for managing the utilization of shared memory resources among a plurality of asynchronous replication workloads. A data replication system maintains a respective replication journal for each replication workload in an allocated portion of system memory of a source server node. Each replication journal is divided into journal barrier intervals by respective individual barriers for transmission to a destination server node. The data replication system waits for a triggering event to occur for generating a common barrier, wherein the triggering event is configured to prevent exhaustion of the allocated portion of system memory for storing the replication journals. The common barrier is generated to close the replication journals of some or all of the replication workloads in advance of the respective individual barriers associated, and the replication journals closed by the common barrier are transmitted to the destination server node.

Sharing memory resources between asynchronous replication workloads

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Haifa, Israel

Evgeny Katz