Defining INDEX target to other location than maildir seems to have no effect.

[Jules]

How can i commit this as bug report?

> Am 30.10.2016 um 11:04 schrieb Julian Sternberg <jules at ispire.me>:
> 
> Dovecot Version 2.2.13
> Linux Distribution: Debian Jessie
> CPU Architecture: x64
> Filesystem: GlusterFS/NFS, XFS for Base System/Index Files.
> Two Dovecot/Postfix nodes accessing same GlusterFS/NFS Maildir.
> 
> Regardless what i choose in mail_location (:INDEX=MEMORY or :INDEX=/var/indexes/%d/%n) all Mailbox index files will still get created within the users mail_location maildir: ~/Maildir
> 
> My mail_location Maildir directory is shared on GlusterFS mount so i need to get index files away from this share due locking mechanism and faster caching.
> 
> The weird is, if i set INDEX to /var/indexes, the index files getting created sometimes but then not updated frequently and exist parallel on Maildir which are mostly newer than on /var/indexes. If you delete the dovecot.index* files from Maildir, they will get recreated immediatly on Imap access but not on the alternative set INDEX location, they are getting recreated within Maildir again.
> 
> Here is doveconf -n Output:
> 
> # 2.2.13: /etc/dovecot/dovecot.conf
> # OS: Linux 3.16.0-4-amd64 x86_64 Debian 8.6
> auth_mechanisms = plain login cram-md5
> disable_plaintext_auth = no
> first_valid_uid = 2000
> hostname = censored.hostname.com
> last_valid_uid = 2000
> lda_mailbox_autocreate = yes
> lda_mailbox_autosubscribe = yes
> listen = *
> lock_method = dotlock
> mail_fsync = always
> mail_gid = 2000
> mail_home = /storage/vmail/%d/%n
> mail_location = maildir:~/Maildir:LAYOUT=fs:INDEX=MEMORY
> mail_nfs_storage = yes
> mail_privileged_group = vmail
> mail_temp_dir = /var/tmp
> mail_uid = 2000
> maildir_very_dirty_syncs = yes
> managesieve_notify_capability = mailto
> managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave
> mmap_disable = yes
> namespace inbox {
>  inbox = yes
>  location =
>  mailbox Archive {
>    auto = no
>    special_use = \Archive
>  }
>  mailbox Archives {
>    auto = no
>    special_use = \Archive
>  }
>  mailbox "Deleted Items" {
>    auto = no
>    special_use = \Trash
>  }
>  mailbox "Deleted Messages" {
>    auto = no
>    special_use = \Trash
>  }
>  mailbox Drafts {
>    auto = no
>    special_use = \Drafts
>  }
>  mailbox Sent {
>    auto = subscribe
>    special_use = \Sent
>  }
>  mailbox "Sent Items" {
>    auto = no
>    special_use = \Sent
>  }
>  mailbox "Sent Messages" {
>    auto = no
>    special_use = \Sent
>  }
>  mailbox Spam {
>    auto = create
>    special_use = \Junk
>  }
>  mailbox Trash {
>    auto = subscribe
>    special_use = \Trash
>  }
>  mailbox virtual/All {
>    auto = no
>    special_use = \All
>  }
>  prefix =
>  separator = /
>  type = private
> }
> passdb {
>  args = /etc/dovecot/dovecot-sql.conf.ext
>  driver = sql
> }
> plugin {
>  quota = maildir:User quota
>  quota_rule = *:storage=1G
>  quota_rule2 = Trash:storage=+100M
>  quota_rule3 = Sent:storage=+100M
>  quota_warning = storage=95%% quota-warning 95 %u
>  quota_warning2 = storage=80%% quota-warning 80 %u
>  sieve = /storage/vmail/%d/%n/sieve/dovecot.sieve
>  sieve_before = /storage/vmail/sieve/dovecot.sieve
>  sieve_dir = /storage/vmail/%d/%n/sieve
>  sieve_global = /storage/vmail/sieve
> }
> postmaster_address = postmaster at censored.hostname.com
> protocols = " imap lmtp sieve pop3"
> quota_full_tempfail = yes
> service auth {
>  unix_listener /var/spool/postfix/private/auth {
>    group = postfix
>    mode = 0660
>    user = postfix
>  }
>  unix_listener auth-userdb {
>    group = vmail
>    mode = 0666
>    user = vmail
>  }
> }
> service imap-login {
>  inet_listener imaps {
>    port = 993
>    ssl = yes
>  }
>  service_count = 0
> }
> service lmtp {
>  unix_listener /var/spool/postfix/private/dovecot-lmtp {
>    group = postfix
>    mode = 0666
>    user = postfix
>  }
> }
> service managesieve-login {
>  inet_listener sieve {
>    port = 4190
>  }
>  service_count = 1
> }
> service pop3-login {
>  inet_listener pop3 {
>    port = 110
>  }
>  inet_listener pop3s {
>    port = 995
>    ssl = yes
>  }
> }
> service quota-warning {
>  executable = script /usr/local/bin/quota-warning.sh
>  unix_listener quota-warning {
>    user = vmail
>  }
>  user = vmail
> }
> ssl = required
> ssl_ca = </etc/ssl/censored.hostname.com/ssl-bundle-mail.crt
> ssl_cert = </etc/ssl/censored.hostname.com/censored_hostname.com.crt
> ssl_cipher_list = ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
> ssl_key = </etc/ssl/censored.hostname.com/censored.hostname.com.key
> ssl_protocols = !SSLv2 !SSLv3
> ssl_require_crl = no
> userdb {
>  args = uid=2000 gid=2000 home=/storage/vmail/%d/%n allow_all_users=yes
>  driver = static
> }
> protocol lmtp {
>  mail_plugins = " quota sieve"
> }
> protocol lda {
>  mail_plugins = " sieve quota"
> }
> protocol imap {
>  imap_client_workarounds = tb-extra-mailbox-sep
>  mail_plugins = " quota imap_quota"
> }
> protocol sieve {
>  mail_max_userip_connections = 10
> }
> protocol pop3 {
>  mail_plugins = " quota"
>  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
>  pop3_uidl_format = %08Xu%08Xv
> }