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Thread: Zimbra Server Sizing

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  1. #1
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    Question Zimbra Server Sizing

    Hello!

    Our organization is very interested in the Zimbra product. I was wondering if there are any server sizing guidelines for building sizing and building a Zimbra system.

    We currently have approximately 2500+ e-mail users, and if we decide to move to the Zimbra product we will need to know what kind of hardware will be required.

    Thanks!

  2. #2
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    Are you looking to use FOSS or NE version ? If NE Zimbra sales would be able to help with sizing.

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    Our organization is currently looking at the FOSS (Open Source) Edition.
    We are starting to get serious about pushing Zimbra into production for 2500 users, and want to make sure we size our servers accordingly.

    Thanks!

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    Quote Originally Posted by johnleboeuf3 View Post
    Our organization is currently looking at the FOSS (Open Source) Edition.
    We are starting to get serious about pushing Zimbra into production for 2500 users, and want to make sure we size our servers accordingly.
    I can't help you personally (I only run a couple of small installs myself), but the questions or similar has come up a few times on the forum in my recent memory so you might find some useful information using the search function, specifically searching the installation and admin sections.

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    I'll give the Installation Forums another shot. If anyone else has any advice please let me know.

    I would think that some of the Zimbra forum moderators might have access to some of that information, or possibly a referral to an organization that could assist in past server sizing results. I would also think there would be some kind of documentation for this as to sizing their paid product, and that these two products are rather similar.

    Thank you!

  6. #6
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    We do have a several docs (different stuff for support, sales, professional services, hosting partners & vars etc) however they're not available to the general public without going through one of those branches first. You can vote for Bug 28000 - Customer accessible sizing guide

    Here's a perfectly good example how everyone's needs are different: http://www.zimbra.com/forums/adminis...html#post92695

    However these questions are good to ask yourself & post answers on if you're looking for community feedback:
    Basic questions to consider in deployment sizing:

    Total Number of Users?

    Number of Active Users? (checking email, calendar, contacts, etc. at least once a day)

    Number of Concurrent Users? (logging into the UI, checking email, calendar, contacts during Message Delivery Peak Period (see question below)

    What percentage of total users will be using Webmail vs POP vs IMAP vs Mobile vs Outlook?
    For example 60% Webmail, 50% IMAP, 10% POP (I don't care if this adds up to 100% of the 10k user count, ie we can consider the fact that users may be accessing ZCS via multiple different clients)
    GAL lookups being done from those IMAP clients?

    Message Delivery Peak Period in minutes?
    Period of time in minutes where message delivery (inbound + outbound) is the highest (i.e. from 10am to 12pm then 120 minutes)

    Percentage Message Delivery Peak Workload?
    What percentage of workload is occurring during the message delivery peak period(s) (i.e. 80% of workload occurs from 10am to 12pm)

    Mailbox Quota per user (MB)?

    Average Mailbox Utilization Percentage % of Quota? (how much of that quota will they generally use) or Average Mailbox Size (MB)?

    Will you be using the Zimbra AS/AV on Zimbra MTAs?

    If no to above, would you have your third party Anti-Spam appliances querying Zimbra LDAP server to check on unknown recipients?

    Total Incoming messages per day?

    Total Prespam Incoming Messages per day? (Prespam = SPAM + LEGIT)

    Total Postspam Incoming Messages per day? (Postspam = LEGIT)

    Number of Postspam Incoming Messages per day? (Postspam = LEGIT)

    Total Outgoing messages per day?

    Number of Outging messages per user per day?

    Average Message Size (KB)?

    Percentage % of Messages with attachments?

    Average Attachment Size (KB)?

    Hardware
    Servers RAM/CPU?

    Storage
    Disks? On-box storage (SCSI vs SATA) vs NAS vs SAN (& Fiber vs iSCSI etc etc) Use raid RAID10 not RAID5 for faster storage. Writes are slower in RAID5 & you are talking about lots of tiny files. Lots of threads on disks if you search. (The NE version has Hierarchical Storage Management which offloads mail after x days to your cheaper/older disks & RAID5 is usually fine for that, but you're not using NE.)

  7. #7
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    Default Sizing for Zimbra

    Hi All,

    Even I have the same requirement ,

    I want to deploy zimbra for 1000,so I need some basic sizing documentation for procuring the hardware for zimbra.

    Kindly help me on the same requirement.

    Regards,

    Sree

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    Same requirement and not information for us to review ? What are the profile of your users ? Web or fat client access ? IMAP connections ? Please take the above post as a template and provide the necessary information.

  9. #9
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    Below is the information that you requested to assist me in sizing the appropriate Zimbra product. Any and all help would be appreciated.

    Total Number of Users? -- 1000

    Number of Active Users? (checking email, calendar, contacts, etc. at least once a day) - 1000

    Number of Concurrent Users? (logging into the UI, checking email, calendar, contacts during Message Delivery Peak Period (see question below) -- 800

    No POP and IMAP Users .



    Message Delivery Peak Period in minutes? -- 9AM to 7PM
    Period of time in minutes where message delivery (inbound + outbound) is the highest (i.e. from 10am to 12pm then 120 minutes)

    Percentage Message Delivery Peak Workload? -- 75%
    What percentage of workload is occurring during the message delivery peak period(s) (i.e. 80% of workload occurs from 10am to 12pm)

    Mailbox Quota per user (MB)? 1000 users @ 115MB
    Average Mailbox Utilization Percentage % of Quota? (how much of that quota will they generally use) or Average Mailbox Size (MB)? -- 60%

    Will you be using the Zimbra AS/AV on Zimbra MTAs? -- NO

    If no to above, would you have your third party Anti-Spam appliances querying Zimbra LDAP server to check on unknown recipients? -- YES

    Total Incoming messages per day? -- 6000

    Total Prespam Incoming Messages per day? (Prespam = SPAM + LEGIT) -- 11000

    Total Postspam Incoming Messages per day? (Postspam = LEGIT) --

    Total Outgoing messages per day? -- 2000

    Number of Outging messages per user per day? -- 25

    Average Message Size (KB)? -- 200k

    Percentage % of Messages with attachments? -- 30% - 50%

    Average Attachment Size (KB)? -- 900k

    Hardware
    Servers RAM/CPU? -- This is where I need some guidance

  10. #10
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    Default Same question with 2500 users

    Question Answer Notes

    Users
    Number of Total Users? 2,000
    Number of Active Users? 900 Number of users logging into the UI, checking email, calendar, contacts, etc. at least once a day
    Number of Concurrent Users? 220 Number of users logging into the UI, checking email, calendar, contacts, etc. at during the Peak Period (see question below)
    Mailboxes
    Mailbox Quota (MB)? 2,048
    Average Mailbox Utilization? 50%
    Average Mailbox Size (MB)? 1,024
    Message Flow
    Incoming
    Total Prespam Incoming Messages per day? 4,818
    Spam Filter Percent 50%
    Total Postspam Incoming Messages per day? 2,409
    Number of Postspam messages per user per day? 1
    Outgoing
    Total Outgoing Messages per day? 1,598
    Number of Outgoing messages per user per day? 1
    Message Size
    Average Message Size (KB)? 35
    Percentage of Messages with attachments? 30%
    Average Attachment Size (KB)? 150
    Peak Period
    Message Delivery Peak Period? (minutes) 120 Period of time in minutes where message delivery (inbound + outbound) is the highest (i.e. from 10am to 12pm then 120 minutes)
    Percentage Message Delivery Peak Workload? 30% What percentage of workload is occurring during the message delivery peak period(s) (i.e. 80% of workload occurs from 10am to 12pm)
    Client Access Method Percentages do not need to add up to 100% as some users may use multiple access methods.
    Webmail 10% What percentage of active users use Webmail
    POP 60% What percentage of active users use POP
    IMAP 20% What percentage of active users use IMAP
    Mobile 10% What percentage of active users use Mobile (ActiveSync, Blackberry, WAP, J2ME, etc.)
    Outlook (MAPI) 0% What percentage of active users use Zimbra Connector for Outlook
    Other Desktop (iSync, Evolution, etc.) 0% What percentage of active users use other desktop sync connectors
    Zimbra Features
    HA Clustering on Zimbra MBS? FALSO
    Proxy Servers (HTTP, IMAP,POP)? FALSO
    Redundant MTAs? FALSO
    Redundant LDAP replicas? FALSO
    AS/AV enabled on Zimbra MTAs? FALSO
    Scan outbound mail? FALSO
    Zimbra Archiving? FALSO
    Number of Days of Archive Data on Disk 0
    Attachment Indexing VERDADERO
    Current Environment
    Industry Sector? Enterprise ISP,Hosted, SMB, Enterprise, EDU, Health Care, Government?
    Existing SAN storage? Fiber Fiber, iSCSI, etc.
    Preferred Server Vendor? HP NetApp, EMC, Dell, etc.
    Virtualization? VERDADERO

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