[RFC 004] Operation Review Comment 13

Review of DAP2 operational experience:

1. Describe in a sentence or two your overall operational experience related to DAP2 (e.g., scientific analysis; science users, server operation; database management; or data translation, etc).� What kinds of DAP2 systems do you have experience with?� (e.g., OPeNDAP netCDF server, OPeNDAP HDF server, OPeNDAP Matlab Toolkit, Ferret, GrADS, and etc).
1. How long have you been using DAP2 operationally?

I tried to integrate OPENDAP netCDF server with SRB (Storage Resource Broker), for scientific data management.� The overall experience is positive. However, it did not match my client�s needs. The server was set up in 2004, and not being used currently.

2. What types of applications do you use DAP2 systems for?� Are the DAP2 systems applicable to your applications? (e.g., Do they work well with the data types and data manipulations in your application?) ��
1. How many of your applications use DAP2?

                                                               i.      Total number of applications

                                                             ii.      Percentage of applications

I tried to use OPENDAP netCDF server as a data portal to end user. We have not found any application that requires OPENDAP at this moment.

3. Why do you choose to use DAP2 systems over other systems for your applications?
1. What alternative technologies did you consider?

Because DAP2 has become a trend in the earth science community.

(a) None.

4. Are the DAP2 systems easy to use?� (e.g., Is it hard to learn how to use DAP2 systems?)
1. How has the use of DAP2 affected your user support workload?

Yes, it�s relatively easy.

(a) this question does not apply to us yet, because we are not using it at this moment.

5. Does the performance of the DAP2 systems you have experienced meet your requirements?� (e.g., Does it take a long time to access data in DAP2 systems?)
1. Have your bandwidth issues changed since you have been using DAP2 systems? (e.g., Have you seen increased bandwidth requirements because of increased data access or DAP2 overhead, decreased bandwidth requirements because of reduced data volume from subsetting, no impact on bandwidth because of low usage?)

Yes.

6. What operational challenges do the DAP2 systems present? (e.g., Does it require advanced processing power, large amounts of memory, complex configuration, etc.? Are the systems easy to deploy and maintain?)
1. How has the use of DAP2 affected your systems administration workload?

I have not experienced any operational challenge.

7. How well do the DAP2 systems scale to large numbers of simultaneous users, or to large datasets?
1. How much data does your DAP2 system handle in a typical month?

                                                               i.      Total data volume

                                                             ii.      Total number of data files

                                                            iii.      Percentage of data volume

                                                           iv.      Percentage of data files

There has not been any scalability testing done.

(a) None.

8. Can you provide information on user statistics of your DAP2 systems?�
1. How many users does your DAP2 system handle in a typical month?

                                                               i.      Total number of DAP2 users

                                                             ii.      Percentage of your overall users

2. Of the feedback you have received from your users on DAP2, what percentage is positive and what is negative?
3. How have the user statistics changed over time?

(a)    none

(b)   Does not apply.

(c)    Does not apply.