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Copyright (C) The Arvados Authors. All rights reserved.

SPDX-License-Identifier: CC-BY-SA-3.0
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h2(#singularity_mksquashfs_configuration). Singularity mksquashfs configuration

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This section is only relevant when using Singularity. Skip this section when using Docker.
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Docker images are converted on the fly by @mksquashfs@, which can consume a considerable amount of RAM. The RAM usage of mksquashfs can be restricted in @/etc/singularity/singularity.conf@ with a line like @mksquashfs mem = 256M@. The amount of memory made available for mksquashfs should be configured lower than the smallest amount of memory requested by a container on the cluster to avoid the conversion being killed for using too much memory. The default memory allocation in CWL is 256M, so that is also a good choice for the @mksquashfs mem@ setting.