Exchange 2013 DAGSrđan StevićUčiteljski fakultet u Beogradu

Agenda

• Brzi pregled starih tehnologija

• Šta nije DAG?

• Šta jeste DAG?

• Primeri (3-node DAG)

• Exchange 2013 poboljšanja

• Kako DAG radi? (replication, quorum, networks)

• Sistemski zahtevi i ograničenja:• Operativni sistem• Exchange verzija• Potreban hardware

• DEMO

• Preporuke

Šta smo pre imali?

• Cluster + shared storage = highly available Exchange

• Exchange Server 2003 clustering

• Exchange 2007 – LCR, SCC, CCR, SCR

• Exchange 2010 – prva verzija DAG-a (CCR + SCR = DAG)

•Šta vi imate?

Šta nije DAG?

• DAG nije high-availability rešenje kompletne e-mailplatforme!!!

• Highly-available CAS infrastruktura• Failure domains

• Internet connection• Network• Storage• Power• Servers• ...

• Ako imam DAG, ne treba mi backup? Da, ali...

Šta jeste DAG?

• DAG je high-availability rešenje za mailbox servere

• Do 16 mailbox servera koji hostuju bazu + File ShareWitness

• Prva verzija DAG-a – Exchange 2010

• Exchange 2013 DAG – poboljšanja i nove opcije• Exchange 2010 feedback

• Office 365 feedback

Prvi primer – 1-site, 3-node DAG

Drugi primer – 3-node DAG, više baza

• DAG member može da hostuje više aktivnih / pasivnih baza

• Status baze je nezavisan u odnosu na ostale baze na MBX serveru

Treći primer – lagged copy

Exchange 2013 DAG poboljšanja

• Multiple databases on a single volume

• Autoreseed

• I/O improvements

• Safety Net (bivši Transport Dumpster)

• Modern public folders

Active Manager

• Deo Microsoft Exchange Replication servisa (MSExchangeRepl)

• Po default-u prisutni, Standby režim

• Odlučuje koja je baza aktivna, a koja pasivna

• Dva moda:• PAM – Primary Active Manager

• SAM – Standby Active Manager

• Switchover & Failover

Kako to radi? – DAG replication

• Continous replication

• File mode replication• Popunjavanje transakcionog log fajla (1 MB)

• active mailbox database -> passive database copy

• Inicijalni seeding: uglavnom „Block mode“ replikacija

• Block mode replication• svaka transakcija se upisuje u log bafer na aktivnom serveru

• šalje se svakom članu DAG-a u log bafer

• svaki član DAG-a pravi svoj transakcioni log fajl

Database Availability Group Quorum

• Windows Server Clustering

• Automatically managed by Exchange

• 2 modela:• Node Majority

• Node and File Share Majority

FSW – File Share Witness

• Network file share

• Pomaže u uspostavljanju kvoruma

• Prvi MBX server kreira folder na FSW

• Exchange Trusted Subsystem security group

Node Majority

Node and File Share Majority

• Dodatni server – File Share Witness

• Obično je to server koji nije Exchange server

Database Availability Group networks

Exchange 2013 DAG with a single network

Exchange 2013 DAG with multiple networks

Sistemski zahtevi i ograničenja

• Exchange 2013 Standard ili Enterprise (dozvoljen mix)

• Isti OS na svakom DAG nodu:• Windows Server 2008 R2 Enterprise ili Datacenter• Windows Server 2012 Standard ili Datacenter• Windows Server 2012 R2 Standard ili Datacenter (samo uz Exchange

Server 2013 SP1)

• Ne zahteva cluster-managed shared storage

• DC + Exchange MBX ne može u DAG (nije preporučljivo ni van DAG-a)

• DAG ime ne sme da pređe 15 karaktera

• 1 gigabit Ethernet minimum, preporuka 10 gigabit Ethernet

…još ograničenja

• 16 servera u DAG-u

• Latencija 500ms (multisite)

• Veličina baze: 2TB maksimalno, 1 TB preporuka, 200 GB najzgodnije

• DAG-aware backup (Windows Server Backup?)

Kako napraviti?

• 2 načina• Exchange Management Shell

• Exchange Admin Center

• Najmanje 2 mailbox servera

• 4 koraka

Korak 1 – computer account

• Cluster Name Object (CNO) – computer account

• Exchange Trusted Subsystem – Full Control

• Prvi mailbox server – Full Control

Korak 2 – Kreiranje DAG-a

• EAC:• New database availability group

• DAG name

• Witness server and witness directory

• DAG IP address

Korak 3 – članovi DAG-a

• Exchange Admin Center:• Manage DAG membership

• Dodati MBX servere u DAG

Korak 4 – add database copy

• Exchange Admin Center:• Odabrati bazu koju želimo da repliciramo

• Add database copy

• Odabrati MBX server koji će hostovati kopiju baze

• Activation preference number

DEMO

• Kako napraviti DAG

• Dodavanje servera u DAG

• Dodavanje database kopija

Windows Server 2012 R2 + Exchange Server 2013 SP1 Database Availability Groups• .

• Dynamic Quorum

• Dynamic Witness

• DAG without a Cluster Administrative Access Point

Korisni linkovi

• Microsoft preferred architecture (PA) for Exchange Server 2013

• Exchange 2013 Server Role Requirements Calculator

• Best Practices for Virtualizing & Managing Exchange 2013

• Microsoft Exchange 2013 on VMware Best Practices Guide

• Anti-Virus Software in the Operating System on Exchange Servers

Please rate this lecture

and win Window Phone NOKIA Lumia 1320

Help us choose the best Sinergija lecturer! Microsoft will award you – at the conference end,

we’ll give one NOKIA Lumia 1320 to someone from the audience – randomly.

Go to www.mssinergija.net, log in and cast your votes!

You can rate only lectures that you were present at, just once. More lectures you rate, more

chances you have.

Winner will be announced at the official Sinergija web portal, www.mssinergija.net