[ARVADOS] updated: 2.1.0-1480-gf3a82584f

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Summary of changes:
 doc/install/singularity.html.textile.liquid | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

  discards  caf80418a903c9be5a8a3dbebd8767bb751f7c4b (commit)
       via  f3a82584fde8dfd3c653c01a5e523360c8615703 (commit)

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commit f3a82584fde8dfd3c653c01a5e523360c8615703
Author: Ward Vandewege <ward at curii.com>
Date:   Fri Oct 8 12:49:20 2021 -0400

    18259: mention `mksquashfs mem` config setting in singularity.conf
    
    Arvados-DCO-1.1-Signed-off-by: Ward Vandewege <ward at curii.com>

diff --git a/doc/install/singularity.html.textile.liquid b/doc/install/singularity.html.textile.liquid
index bd990b491..d843912e1 100644
--- a/doc/install/singularity.html.textile.liquid
+++ b/doc/install/singularity.html.textile.liquid
@@ -21,6 +21,10 @@ Arvados can be configured to use "Singularity":https://sylabs.io/singularity/ in
 ** The Docker ENTRYPOINT instruction is ignored.
 * Arvados is tested with Singularity version 3.7.4. Other versions may not work.
 
+*Notes*:
+
+* 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 = 512M at . 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.
+
 h2(#configuration). Configuration
 
 To use singularity, first make sure "Singularity is installed":https://sylabs.io/guides/3.7/user-guide/quick_start.html on your cloud worker image or SLURM/LSF compute nodes as applicable. Note @squashfs-tools@ is required.

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