Filesystem functionality used by notmuch

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+ for <notmuch@notmuchmail.org>; Wed, 13 Jan 2016 17:53:53 -0500 (EST)\r
+From: Erik Quaeghebeur <notmuch@equaeghe.nospammail.net>\r
+To: notmuch@notmuchmail.org\r
+Subject: Filesystem functionality used by notmuch\r
+Date: Wed, 13 Jan 2016 23:53:52 +0100\r
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+\r
+Dear group,\r
+\r
+\r
+Context: FUSE filesystem for accessing data in a database.\r
+\r
+I understand that notmuch needs to be able to read a file given a filename (including its path). Are there any more requirements on the filesystem. For example, I assume that filename modification is optional (maildir flag changes). But perhaps notmuch makes use of times stored with files or some other file property?\r
+\r
+\r
+Best,\r
+\r
+Erik\r