TIPS/JIM
September 20, 2012
Agenda:
INS News (Margaret Meixner); JWST Update (Tom Brown)!
The Wide-Field Slitless Spectroscopy Mode of NIRISS (Van Dixon)!
D2D Data Protection Solution Evaluation (Prem Mishra)
Next TIPS/JIM: October 18, 2012
1
INS News/Status
September 20, 2012
We are webcasting TIPS, so please remember to wait for the microphone before asking
your question.
You will notice only 2 TIPS presentations today, please consider signing up for future
presentations by contacting Dixie Shipley. We are all interested in hearing about any
recently published, submitted or soon to be submitted technical reports or works.
The INS picnic is on Sunday September 23, 12 noon to 5 PM at the same Peco tent
location in Oregon Ridge park that we had the event last year. We have a good turn out
and the weather promises to be sunny and cool (68 degrees Farenheit). Dixie and
Annie are still trying to collect the remaining $7 fees from some of the attendees, so try
to get this to them when you can. We know itʼs been a very busy week for many of you
with the various meetings. Also, if you would like to attend and forgot to sign up, you
are welcomed to come, just visit the website and drop by Annie or Dixie's office by
tomorrow, Friday.
Thanks for your ideas on Scientific Python course content. Our Scientific python
committee has been refining the course and hopes to release a schedule and
announcement in the next two weeks.
-HST is doing well.
And now to Tom Brown for an update on JWST.. TIPS/JIM
September 20, 2012
Agenda:
INS News (Margaret Meixner); JWST Update (Tom Brown)!
The Wide-Field Slitless Spectroscopy Mode of NIRISS (Van Dixon)!
D2D Data Protection Solution Evaluation (Prem Mishra)
Next TIPS/JIM: October 18, 2012
1
Wide-Field Slitless Spectr scopy
with NIRISS
Van Dixon
STScI
TIPS/JIM
2012 September 20
NIRISS at a Glance
Parameter
Value
Array Size
2048 x 2048 (2040 x 2040 active)
Pixel size
18 µm x 18 µm
Dark rate
< 0.02 e-/s
Noise
23 e- (correlated double sample)
Gain
1.5 e-/ADU
Field of View
2.2’ x 2.2’
Plate scale in x
0.0654 arcsec/pixel
Plate scale in y
0.0658 arcsec/pixel
TIPS/JIM
2012 September 20
Dual-Wheel Configuration
GR150R
TIPS/JIM
2012 September 20
GR150C
Dual-Wheel Configuration
GR150R
GR150C
TIPS/JIM
2012 September 20
GR150C
GR150R
Blaze Function for GR150 Grisms
igure 4. Blaze function of the GR150 grism measured on a flight-like grism. The flight prisms are expected to have ve
milar performance.
TIPS/JIM
2012 September 20
The two GR150 grisms are identical except that they are mounted so as to disperse light 90◦ from on
nother, one along the detector rows (GR150R) and the other along the columns (GR150C). Observing the sam
First-Order Sensitivity: Emission Lines
Minimum line flux to reach S/N = 10 in 10 ks
TIPS/JIM
2012 September 20
First-Order Sensitivity: Emission Lines
z=9
z = 17
Redshifted Lyman α
TIPS/JIM
2012 September 20
The Software
Ø  The aXe software package was developed to support slitless spectroscopy
with ACS and WFC3 (Kümmel et al. 2009).
aXeSIM generates synthetic direct and dispersed images of the sky.
aXe extracts and calibrates spectra.
aXedrizzle allows for the combination of dithered images.
aXe2web displays the extracted spectra in a convenient HTML format.
aXe was originally developed by the Space Telescope - European
Coordinating Facility (ST-ECF). The code is now supported by STScI.
Ø  Source Extractor builds a catalog of objects from an astronomical image
(Bertin & Arnouts 1996).
TIPS/JIM
2012 September 20
Input for aXeSIM
Ø  Configuration file
•  Location, trace, and dispersion of each spectral order
Ø  Sensitivity (including grating)
•  e- per erg/cm2
Ø  Throughput (w/out grating; used to make direct image)
Ø  Flat Field (may be wavelength-dependent)
Ø  Master Sky Background Image
Ø  Input Catalog (output from Source Extractor)
•  Specify image size and shape or point to image file
Ø  Postage-stamp images
Ø  Spectra
TIPS/JIM
2012 September 20
Location of Each Order (F150W)
2040 pixels
Direct Image
-1
-601 -512
0
-227
+1
0 53 148
1.03 1.3 1.7 (µm)
TIPS/JIM
2012 September 20
+2
336
+3
520
619
893
Model Object Table
#
#
#
#
#
#
#
#
#
#
1
2
3
4
5
6
7
1 NUMBER
2 X_IMAGE
3 Y_IMAGE
4 A_IMAGE
5 B_IMAGE
6 THETA_IMAGE
7 MAG_F1537
8 SPECTEMP
9 Z
10 MODIMAGE
900.00 1500.00
900.00 1250.00
900.00 1000.00
900.00 750.00
900.00 700.00
900.00 650.00
900.00 600.00
x
y
TIPS/JIM
2012 September 20
Object number
X coordinate (pixels)
Y coordinate (pixels)
Length of semi-major axis (pixels)
Length of semi-minor axis (pixels)
Angle of major axis
Magnitude at 1537 nm (WFC3 F160W)
Key to spectral template
Redshift
Key to model image
0.6 0.6
0.0 22.5 0 0.0
0
30.0 10.0 45.0 18.0 0 0.0
0
18.0 10.0 -30.0 18.0 1 0.0
1
5.0 2.0 60.0 18.0 2 0.0
0
5.0 2.0 60.0 18.0 2 0.075 0
5.0 2.0 60.0 18.0 2 0.15 0
5.0 2.0 60.0 18.0 2 0.22 0
a
b
θ
mag sp
z
image
Dispersed Image (log stretch)
-1
0
+1
2040 pixels
TIPS/JIM
2012 September 20
+2
+3
Millennium Run Observatory
Semi-analytic galaxy-formation models based on the
Millennium Run dark-matter simulations
H-band image using the WFC3/F160W bandpass
Overzier et al. 2012 (MNRAS, in press)
TIPS/JIM
2012 September 20
Direct Image w/ NIRISS PSF
TIPS/JIM
2012 September 20
Direct Image w/ Background (100 s)
TIPS/JIM
2012 September 20
Source Extractor Apertures
TIPS/JIM
2012 September 20
Dispersed Image: Horizontal
TIPS/JIM
2012 September 20
Dispersed Image: Vertical
TIPS/JIM
2012 September 20
aXe2web
TIPS/JIM
2012 September 20
TIPS/JIM
September 20, 2012
Agenda:
INS News (Margaret Meixner); JWST Update (Tom Brown)!
The Wide-Field Slitless Spectroscopy Mode of NIRISS (Van Dixon)!
D2D Data Protection Solution Evaluation (Prem Mishra)
Next TIPS/JIM: October 18, 2012
1
D2D Data Protection Solution Evaluation
Project #552
1
Background
Ÿ  Deal with Big Data
Ÿ  Need to backup critical datasets (including VMware environment, Select
Central File Systems, Exchange environment and any critical servers
including the databases) and restore them in a very quick fashion
Ÿ  Our Situation is Unique
–  Have to backup multiple PBs of data (Is that a challenge? Everyone
does that…)
–  No DR site – Every backup runs from Production Data set
–  Production Data is already on the cheapest disk
–  T1 disk backup cost @ about $1200 / TB
–  Need to send backup data to remote site
Ÿ  Need a solution that is flexible and ever evolving
–  Software should be modular and flexible
–  Software vendor should be flexible and willing to work with us to
address the new challenges by its development effort from our
continuous feedback
–  Should have flexible HW component and should not be HW
dependent
2
Our Approach – Define Backup Tiering
Ÿ  1st tier - Deduplicated disk target datasets at local site and secondary copy on tape
at remote site for DR purpose
–  This method will provide us the quickest way of backing up and restoring the systems and data and also
will be helpful in saving disk space for backup jobs by not storing any duplicate data sets in the backup
target disks. (Most efficient and expensive)
–  Cost Calculated – Per TB
Ÿ  2nd tier - Non Deduplicated Staging Disk target at local site and secondary copy on
tape at remote site for DR
–  This method will provide us a quicker way to backup and restore the data compared to the traditional way
of backing up to the tape. This method however will not help us saving any disk space during the
backups. (Efficient than traditional backup and comparatively less expensive than the first option)
–  Cost Calculated - Per TB
Ÿ  3rd tier (Direct Tape target for data to be sent to remote site for DR purpose)
–
This is the traditional approach and will have the longest time window requirement for backup and restore
of data and systems. (Traditional Approach and most cost effective)
–  Cost – No per TB cap / should allow unlimited data backup with fixed licensing
3
Data Protection Market – Too Crowded ???
4
Technologies Shortlisted for Onsite Evaluation
•
All the above satisfy our basic requirements
•
will be able to backup the mixed OS / Application environment at STScI
•
Offer the tiering approach to backup different type of data sets and…
5
Unique Approach Towards Enterprise Data Protection
Ÿ  Commvault:
–  Industry’s leader in Backup and Recovery Solutions and at the top most position on the Gartner’s
Magic Quadrant for Enterprise Disk-Based Backup/Recovery
–  Has a single software and unified management suite and has very clear focus on the data
protection and management segment
Ÿ  EMC:
–  Existing solution at STScI
–  One of the largest players in the industry and has acquired many different products and
companies to provide Backup and Recovery Solutions of different types
–  Positioned in the leaders segment on the Gartner’s Magic Quadrant for Enterprise Disk-Based
Backup/Recovery
Ÿ  NSB (Netapp Syncsort Backup):
–  Most innovative and a different approach for Enterprise Disk-Based Backup/Recovery to provide
the quickest access to application data independent of data size
–  As per ESG Syncsort and Netapp extended their capabilities via partnerships augmenting their
base data protection features to meet current and prospective customer requirements. This
partnership has positioned Netapp in the visionaries segment on the Gartner’s Magic Quadrant for
Enterprise Disk-Based Backup/Recovery
6
Evaluation / Selection Process
Ÿ  Presentation and product demo from the Vendors
Ÿ  One to one discussion with each vendor to discuss our challenges and
to understand their approach to address our challenges
Ÿ  RFI to the Vendors to collect official solution overview and commitment
for an onsite product evaluation
Ÿ  Discussion of environmental requirement and evaluation schedule with
each vendor
Ÿ  Distribution and agreement on the evaluation environment and checklist
with each vendor
Ÿ  Preparation of testing environment to reflect our production as close as
possible
Ÿ  Installation of loaner HW in our Datacenter
Ÿ  Onsite Evaluation
7
What we experienced
Ÿ  Complications and ease of usability of each solution
Ÿ  Identified / came across some of the interesting undocumented features
(Bugs) in the software (some of them even came to notice of the vendor
for first time)
Ÿ  Post Sales support from Commvault and Syncsort
8
Evaluation Parameters
Ÿ  Backup and Restore of local data on Windows System and Linux
Systems
Ÿ  Backup and Restore of MS SQL Server / Databases
Ÿ  Backup and Restore of Exchange infrastructure
Ÿ  Backup and Restore of NAS Data
Ÿ  Bare Metal Restore
Ÿ  Backup and Restore of VMware infrastructure (VMs and Data)
Ÿ  D2D2D, D2D2T, D2T availability
Ÿ  Deduplication
Ÿ  Ease of Use of the Data protection Solution
Ÿ  Ease of restoring at a DR site
Ÿ  Overall approach of the solution towards Data Protection
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Preferred Solution
Ÿ  After various rounds of internal discussion and considerations of all the
different angles including technical features, usability, initial investment
and long term maintenance cost, Commvault was selected as the
technology provider for the data protection solution by the ITSD
management.
Ÿ  Commvault`s “SOFTWARE ONLY "solution provides flexibility to select a
storage system as per our choice and budget and not get locked into a
particular hardware platform and storage system.
21
Thank You
22