Cloud storage DRP and SOA is a wave of the future
The
advent of cloud computing and service-oriented data protection is
mutating the role of backup administrator. The backup process is becoming a
service offering by the IT department as part of the internal cloud's
application service level agreement.
The backup administrator's role
is transforming from the traditional "tape jockey" into a "data protection
policy manager". An example of this is the push by many to make network backup
more of a policy engine for backup and disaster recovery ? business continuity.
Three
recent advancements in technology are beginning to transform data center
operations and the role of the IT Administrator:
·
Virtualization (Server and Storage)
·
Disk-based continuous and snapshot data
protection
·
Data Deduplication
Virtualization (Server and
Storage): The role of server virtualization is to provide an abstraction
layer between the server hardware and applications, so they can be moved between
servers at will, and the role of storage virtualization is to provide the same
abstraction between the servers and the storage.
The ability to abstract applications and storage from the actual
hardware makes the hardware a commodity, enables applications to be moved from
one server to another at anytime, without downtime, and allows storage to be
purchased based on price and reliability, rather than functionality in the
firmware.
Storage virtualization also facilitates the movement of data.
Application data can be moved anywhere, anytime, based on performance or other
requirements via a policy created by the IT admin.
Disk-based continuous and
snapshot data protection: A continuous data protection (CDP) and
snapshots to the mix eliminates the need to do bulk transfers of data over the
network to make actual backup copies. The definition of a backup is a copy of
the data, and it has to be a full copy to actually be a backup.
The
backup copy must be separate from the production copy, and must be stored on
physically separate hardware or storage media. Once the base copy is available,
that copy can be used as the source for snapshots so that the primary copy is
unaffected.
In
order to accomplish real-time non-disruptive snapshots, the copy must be
continually updated via CDP technology to capture any new information between
snapshots. Instead of the traditional method of backing the data up with a bulk
copy operation, data is simply always protected, continually through CDP, and
periodically via the snapshots.
Data Deduplication (DD
): So far, we have virtualized everything and have implemented
continuous protection for our critical data, and are making periodic snapshots
of everything else. Backup is the killer application for DD, but DD also helps
make DRP/BCP much more efficient.
The reason backup is the killer application is because a full backup copies the
same files over and over again. As an example, let's take a legal company with
500 desktops running Excel that are backed up using weekly full copies with a 30
day retention.
How
many copies of excel.exe do you need to store? Without DD the first week there are 500 copies of it
on tape, the next week there are 1000, the week after that there are 1500
copies, and the last week there are 2000 copies of that one file before the
tapes are over written.
Now
extrapolate that out to every file in the organization. You can see how it a DDs
up real fast. If you do the math, using typical backup operations and retention
requirements, 20TB worth of data with a 2% change rate and 3% growth rate will
require over 101TB of media storage if retained over 5 weeks.
With
DD The same 20TB with the same growth and change rate at a 7:1 DD ratio could be
stored in about 24TB. (101TB - 24TB = a savings of 77TB worth of space!) You can
begin to see how much money you can save over time here. But that's not the main
benefit of DD.
The
main financial benefit of DD (besides less media and storage) is how it saves
WAN bandwidth for data replication. WAN bandwidth is typically a re-occurring
monthly cost, and although the cost has been going down, it's still a major part
of most IT budgets, which is the reason many companies are still shipping backup
tapes offsite for disaster recovery. Imagine being able to get data replicated
offsite electronically more efficiently and at a lower cost than shipping and
storing tapes!
In
summary the steps to create an internal corporate cloud.
1.
Virtualize everything so application and
data location are irrelevant
2.
Continually protect, rather than use a
bulk copy backup for data protection, which will change the physics of backup by
removing the need to move large amounts of data at the same time.
3.
DD everything so it can be stored and
moved efficiently
4.
Create policies for storage tiers and
data life-cycle, and apply those policies on the objects being stored (files,
blocks, and tapes) so that the entire data life-cycle is automated, and
everything moves to where it belongs based on that policy.
Pandemic Disaster Recovery Plans At Risk
Pandemic disaster recovery
planning should consider the impact the H1N1 flu virus could have on the
Internet if workers and students are forced to stay home because of the pandemic. Officials at
the U.S. Government Accountability Office weighed in on the potential for
clogged networks in a 71 page preport.
Although the issue has been raised before by
various ISPs and network carriers, recent worries have focused on securities
firms that depend on third parties to clear trades and process payments over the
Internet, according to the GAO.
"Internet congestion during a severe pandemic that
hampers teleworkers is anticipated, but responsible government agencies have not
developed plans to to address such congestion and may lack clear authority to
act," the GAO warned.
Internet backbone congestion from a pandemic is not
a major concern. The larger problem may be with the network "edge" or "last
mile" in the residential portion of the Internet. Janco says that work-at-home
strategies for organization may not work as advertized as residential Internet
access may not be sufficient. This is true both from a capacity and
bandwidth at work at home sites.
Often many residential DSL users could share a
single DSLAM connection at the carrier's switching office to reach the backbone,
contributing to congestion problems. Last-mile DSL and cable modem networks are
where remote access falls apart.
While the network edge impact would vary by
neighborhood, the Centers for Disease Control planning guideline that assumes 40
percent of the workforce might not be in the workplace for an extended period of
time during a pandemic.
Pandemic Disaster Recovery and Business Continuity Planning First Steps
It is not
possible to estimate the number of cases of the swine flu - (H1N1) England alone
has over 100,000 infections and over 100 deaths. A worldwide pandemic is
occurring. Young, obese, and pregnant individuals are primarily affected. The
virus is easily destroyed; most cleansers will work, and it appears to be viable
about 7 hours on a hard surface and one hour on porous fabric. Patients are most
infectious when first coming down with flu, but remain infectious throughout the
illness.
Disaster Planning
documentation needs to be updated. In addition, businesses should take
common-sense precautions before the pandemic, such as
frequently having disinfecting wipes available, having employees and visitors wash hands with
soap, use disposable towels in
toilet areas, and having employees
stay at home if they are feeling ill.
Organizations should start preparing now to operate in a quarantine
scenario. A key word is cluster, when there are a number of related infections
in a department or facility, you can expect to see it close for ten to twenty
days and people either voluntarily not going there, or being directed not to go
to that location.
Two
of the most important issues are how to keep Information Technology and Computer
Operations up. CIO and IT managers need to start asking hard questions right
now, about how operations will continue if a significant number of people get
sick. Technical people do not tend to look at all of the parts of the system and
you do not want to wait till you are in a flu situation before you start asking
questions and finding out that everything except backups and fund transfers can
be done remotely.
Janco
has just issued a pandemic
press release on how to upate your disaster recovery
plan.